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NT
Nguyễn Thị Hồng Lê
13 tháng 6 2018

The function f is defined on the real numbers by f(x)= ax-3f(x)=ax−3. What is the value of a if f(5)=12f(5)=12? Answer:
#Toán lớp 7
1
LH
Lương Hữu Thành
13 tháng 6 2018

đề bài sai

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TT
Trần Thị Anh Thư
28 tháng 2 2018
Câu 1 The function mm is defined on the real numbers by m(k) = \dfrac{k+2}{k+8}m(k)= k+8 k+2 ​ . What is the value of 10\times m(2)10×m(2)? Answer: Câu 2 The function ff is defined on the real numbers by f(x)= ax-3f(x)=ax−3. What is the value of a if f(3)=9f(3)=9? Answer: Câu 3 The function ff is defined on the real numbers by f(x)= 2x+a-3f(x)=2x+a−3. What is the value of a if f(-5)=11f(−5)=11? Answer: Câu 4 The function ff is defined on the real numbers by f(x) = 2 +...
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Câu 1 The function mm is defined on the real numbers by m(k) = \dfrac{k+2}{k+8}m(k)= k+8 k+2 ​ . What is the value of 10\times m(2)10×m(2)? Answer: Câu 2 The function ff is defined on the real numbers by f(x)= ax-3f(x)=ax−3. What is the value of a if f(3)=9f(3)=9? Answer: Câu 3 The function ff is defined on the real numbers by f(x)= 2x+a-3f(x)=2x+a−3. What is the value of a if f(-5)=11f(−5)=11? Answer: Câu 4 The function ff is defined on the real numbers by f(x) = 2 + x-x^2f(x)=2+x−x 2 . What is the value of f(-3)f(−3)? Answer: Câu 5 Given a real number aa and a function ff is defined on the real numbers by f(x)=-6\times|3x|-4f(x)=−6×∣3x∣−4. Compare: f(a)f(a) f(-a)f(−a) Câu 6 There are ordered pairs (x;y)(x;y) where xx and yy are integers such that \dfrac{5}{x}+\dfrac{y}{4}=\dfrac{1}{8} x 5 ​ + 4 y ​ = 8 1 ​ Câu 7 Given a negative number kk and a function ff is defined on the real numbers by f(x)=\dfrac{6}{13}xf(x)= 13 6 ​ x. Compare: f(k)f(k) f(-k)f(−k) Câu 8 Given a positive number kk and a function ff is defined on the real numbers by f(x)=\dfrac{-3}{4}x+4f(x)= 4 −3 ​ x+4. Compare: f(k)f(k) f(-k)f(−k). Câu 9 A=(1+2+3+\ldots+90) \times(12 \times34-6 \times 68):(\dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{5}+\dfrac{1}{6})=A=(1+2+3+…+90)×(12×34−6×68):( 3 1 ​ + 4 1 ​ + 5 1 ​ + 6 1 ​ )= Câu 10 Given that \dfrac{2x+y+z+t}{x}=\dfrac{x+2y+z+t}{y}=\dfrac{x+y+2z+t}{z}=\dfrac{x+y+z+2t}{t} x 2x+y+z+t ​ = y x+2y+z+t ​ = z x+y+2z+t ​ = t x+y+z+2t ​ . The negative value of \dfrac{x+y}{z+t}+\dfrac{y+z}{t+x}+\dfrac{z+t}{x+y}+\dfrac{t+x}{y+z} z+t x+y ​ + t+x y+z ​ + x+y z+t ​ + y+z t+x ​ is
#Toán lớp 7
2
TT
Trần Thị Anh Thư
28 tháng 2 2018

nhanh đi nhé

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NQ
Nguyễn Qúy Cảnh
1 tháng 11 2019

KHO QUÁ ĐI

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NT
Nguyễn Thị Hồng Lê
13 tháng 6 2018
  The function g is defined on the real numbers by g(x) = 2x + x(x+3)g(x)=2x+x(x+3).  What is the value of g(2)g(2)? Answer:  Câu 2 The function p is defined on the real numbers by p(q) =\dfrac{q^2-q}{(q+1)q}p(q)=(q+1)qq2−q​. What is the value of 10\times p(-11)10×p(−11)?Answer:  Câu 3 The function p is defined on the real numbers by p(q) = 3-\left| {3q-7} \right|p(q)=3−∣3q−7∣. What is the value of p(-2)p(−2)? Answer:  Câu 4 The function f is defined on the real numbers...
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  •  

    The function g is defined on the real numbers by g(x) = 2x + x(x+3)g(x)=2x+x(x+3).  What is the value of g(2)g(2)?
     Answer:

     

     

  • Câu 2

     

    The function p is defined on the real numbers by p(q) =\dfrac{q^2-q}{(q+1)q}p(q)=(q+1)qq2−q​. What is the value of 10\times p(-11)10×p(−11)?
    Answer:

     

     

  • Câu 3

     

    The function p is defined on the real numbers by p(q) = 3-\left| {3q-7} \right|p(q)=3−∣3q−7∣. What is the value of p(-2)p(−2)?
     Answer:

     

     

  • Câu 4

     

    The function f is defined on the real numbers by f(x)= 2x+a-3f(x)=2x+a−3. What is the value of a if f(-3)=6f(−3)=6?
    Answer:

     

     

  • Câu 5

     

    Given a negative number k and a function ff is defined on the real numbers by f(x)=\dfrac{6}{13}xf(x)=136​x.
    Compare: f(k)f(-k)

     

    f(-k)f(−k)

     
#Toán lớp 7
0
TK
Tạ Kim Bảo Hoàng
8 tháng 8 2017
The function  is defined on the real numbers by . What is the value of ? Answer: Câu 2:The function  is defined on the real numbers by . What is the value of a if ? Answer: Câu 3:The function  is defined on the real numbers by . What is the value of ? Answer: Câu 4:The function  is defined on the real numbers by . What is the value of ?Answer:Câu 5:Given triangle ABC, m∠B=60°. Two bisectors AP and CQ intersect at I.The measure of angle AIC is  Câu 6:Câu 7:Câu 8:Given a negative...
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The function  is defined on the real numbers by . What is the value of ?
 Answer: 

Câu 2:
The function  is defined on the real numbers by . What is the value of a if ?
 Answer: 

Câu 3:
The function  is defined on the real numbers by . What is the value of ?
 Answer: 

Câu 4:
The function  is defined on the real numbers by . What is the value of ?
Answer:

Câu 5:
Given triangle ABC, m∠B=60°. Two bisectors AP and CQ intersect at I.The measure of angle AIC is  

Câu 6:

Câu 7:

Câu 8:
Given a negative number  and a function  is defined on thereal numbers by .
Compare:   

Câu 9:
Given a positive number  and a function  is defined on thereal numbers by .
Compare:   .

Câu 10:
Given a real number  and a function  is defined on the realnumbers by .
Compare:   
#Toán lớp 7
0
HT
Hoàng Thế Vinh
12 tháng 3 2017
1) ABC is a triangle where M is the midpoint of segment BC. MD and ME are two bisectors of triangles AMB and AMC respectively. If AM= m; BC = a . Then DE = ??? 2)\(\dfrac{1}{\left(x+29\right)^2}+\dfrac{1}{\left(x+30\right)^2}=\dfrac{5}{4}\) What is the product of all real solutions to the equation above? 3) The sum of all possible natural numbers n such that \(n^2+n+1589\) is a perfect square is..... 4) Given that x is a positive integer such that x and x+99 are perfect squares The...
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1) ABC is a triangle where M is the midpoint of segment BC.

MD and ME are two bisectors of triangles AMB and AMC respectively.

If AM= m; BC = a . Then DE = ???

2)\(\dfrac{1}{\left(x+29\right)^2}+\dfrac{1}{\left(x+30\right)^2}=\dfrac{5}{4}\)

What is the product of all real solutions to the equation above?

3) The sum of all possible natural numbers n such that

\(n^2+n+1589\) is a perfect square is.....

4) Given that x is a positive integer such that x and x+99 are perfect squares

The sum of integer x is ...

5)The operation @ on two numbers produces a number equal to their sum minus 2. The value of

(...((1@2)@3....@2017)

6) Given f(x)=\(\dfrac{x^2}{2x-2x^2-1}\)

=> \(f\left(\dfrac{1}{2016}\right)+f\left(\dfrac{2}{2016}\right)+f\left(\dfrac{3}{2016}\right)+...+f\left(\dfrac{2016}{2016}\right)\)

Các bn giúp mk vs >>> tks nha!!!
#Toán lớp 8
2
PN
Phan Nguyễn Hoàng Vinh
19 tháng 3 2017

?????????????????????????????????????????????? Are you learning English or Math? I'm sure you are're mistake of English

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HT
Hoàng Thế Vinh
19 tháng 3 2017

:v

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HV
Hoàng Vũ Ánh Dương
13 tháng 12 2017

Suppose f(x) is a polynomial of x.If f(x) has a remainder of 3 when it is divided by 2(x-1) and 2f(x) has a remainder of -4 when it is divided by 3(x+2).Thus when 3f(x) is divided by 4(\(x^2+x-2\)),the remainder is ax+b,where a and b are constants.Then a+b=...............
#Toán lớp 8
2
HD
Ha Dlvy
13 tháng 12 2017

Giả sử f (x) là một đa thức của x.Nếu f (x) có 3 phần còn lại khi chia cho 2 (x-1) và 2f (x) có phần còn lại của -4 khi chia cho 3 ( x + 2) .Vì khi 3f (x) được chia cho 4 ( x 2 + x - 2 x2 + x-2), phần còn lại là ax + b, trong đó a và b là hằng số. Sau đó a + b = ...............

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HD
Ha Dlvy
13 tháng 12 2017

ai biết giúp nha

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TY
Tohka Yatogami
6 tháng 4 2015

If F is a 4- digit number, divisible by 9,10 and 13 then the smallest value of F is.........
#Toán lớp 4
0
BT
Bùi Tấn Sỹ
7 tháng 4 2017
câu 1: A rectangle has a length of 60cm and a width of 30cm. It is cut into 2 indentical squares, 2 identical rectangles and a shaded small square. Find the area of the shaded square. Find the area of the shaded square. câu 2.The number of ordered pairs (x; y) where x, y ∈ N* such that x2y2 - 2(x + y) is perfect square is .......... câu 3.Let ABCD be the square with the side length 56cm. If E and F lie on CD, C respectively such that CF = 14cm and EAF = 45o then CE = ........cm. câu...
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câu 1: A rectangle has a length of 60cm and a width of 30cm. It is cut into 2 indentical squares, 2 identical rectangles and a shaded small square. Find the area of the shaded square.
Find the area of the shaded square.
Đề thi violympic toán tiếng anh lớp 8 vòng 10
câu 2.The number of ordered pairs (x; y) where x, y ∈ N* such that x2y2 - 2(x + y) is perfect square is ..........

câu 3.Let ABCD be the square with the side length 56cm. If E and F lie on CD, C respectively such that CF = 14cm and EAF = 45o then CE = ........cm.

câu 4.

Given P(x) = (x2 - 1/2 x - 1/2)1008
If P(x) = a2016x2016 + a2015x2015 + ..... + a1x + a0
then the value of the sum a0 + a2 + a4 + .... + a2014 is ...........

Write your answer by decimal in simplest form câu 5.Let ABC be an isoceles triangle (AB = AC) and its area is 501cm2. BD is the internal bisector of the angle ABC (D ∈ AC), E is a point on the opposite ray of CA such that CE = CB. I is a point on BC such that CI = 1/2 BI. The line EI meets AB at K, BD meets KC at H. Find the area of the triangle AHC. câu 6. all roots of the polynomial P(x) = x2 + 5x - 1 are also roots of the polynomial Q(x) = x3 + ax2 + bx + c then the value of a + b + 6c is ............ câu 7.Suppose that the polynomial f(x) = x5 - x4 - 4x3 + 2x2 + 4x + 1 has 5 solutions x1; x2; x3; x4; x5. The other polynomial k(x) = x2 - 4.
Find the value of P = k(x1) x k(x2) x k(x3) x k(x4) x k(x5) câu 8.The smallest value of Đề thi violympic toán tiếng anh lớp 8 vòng 10 is ............. câu 9.Let ABCD be a trapezoid with bases AB, CD and O be the intersection of AC and BD. If the areas of triangle OAB, triangle OCD are 16cm2, 40cm2respectively and M is the midpoint of BD, then the area of the triangle AMD is .........cm2. câu 10.Bottle A contains 15% syrup. Bottle B contains 40% syrup. When these 2 bottles of syrup are mixed, the syrup content is 30% and the total volume is 600ml. How much syrup is in the bottle A at first? câu 11.Let ABCD.A'B'C'D' be a cube with AC' = √3cm. Find the total surface area of this cube. câu 12.Let ABC be a triangle with AB = 3cm, AC = 7cm. The internal bisector of the angle BAC intersects BC at D. The line passing through D and parallel to AC cuts AB at E. Find the measure of DE. câu 12.Given two numbers x, y such that (4y2 - 12y + 25)(4x2 + 6x + 4) = 28
The ratio of y to x is ........ câu 13.Mr.Joseph drives car from A to B at a constant speed. If the speed of the car is increased by 20%, it takes him one hour less than the usual time. If he drives at the constant speed for the first 100km before increasing the speed by 30%, it also takes him one hour less than the usual. The distance of AB is ..........km. câu 14.A triangle ABC has  = 120o and the bisector AD (D ∈ BC). If AB = 40cm, AD = 30cm, then AC = ..... cm. câu 15.As shown in the figure, the length of BE is .............
Đề thi violympic toán tiếng anh lớp 8 vòng 10 câu 16.

Let f(x) the polynomial given by f(x) = (1 + 2x + 3x2 + 4x3 + 5x4 + 84x5)
Suppose that f(x) = ao + a1x + a2x2 + ..... + ..... + a50x50.
The value of T = a1 + a2 + .... + a50 is .........

  • a. 9910 - 1
  • b. 9910
  • c. 10010
  • d. 10010 - 1
  • câu 17.Find the area of the trapezoid ABCD, BC // AD, AB = CD = 5cm, BC = 10cm, AD = 16cm.
    The area of the trapezoid ABCD is .........cm2.
  • câu 18.Find the least possible value of A = 4x2 - 3x + 1/4x + 2015, where x varies in the set of positive real numbers. The least possible value of A is
  • câu 19.
#Toán lớp 9
0
TM
Thủy Mai Thị
10 tháng 11 2016
Câu 1: Given that  is divisible by 9. What is the value of ? Câu 2: How many elements of the set A are divisible by 9?Câu 3:A is a set of multiples of 12 less than 12. How many elements does the set A have?Câu 4:Find the remainder when  is divided by 3.Câu 5:Given that 511 is the sum of two prime numbers  and , . What is the value of ?Câu 6:Given that . Find the value of .Câu 7:Given that . How many divisors does the number A have?Câu 8:Find the natural number  so that the product of...
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Câu 1: Given that  is divisible by 9. What is the value of ? 
Câu 2: How many elements of the set A are divisible by 9?
Câu 3:A is a set of multiples of 12 less than 12. How many elements does the set A have?
Câu 4:Find the remainder when  is divided by 3.
Câu 5:Given that 511 is the sum of two prime numbers  and , . What is the value of ?
Câu 6:Given that . Find the value of .
Câu 7:Given that . How many divisors does the number A have?
Câu 8:Find the natural number  so that the product of  and 5 is a prime number.
Câu 9:
Given that . How many divisors does the number A have?
Câu 10:
Given that . How many divisors the number A have?
 
#Toán lớp 6
7
SM
Sera Masumi
10 tháng 11 2016

Câu 1: Cho chia hết cho 9. giá trị là gì?

Câu 2: Có bao nhiêu phần tử của tập A chia hết cho 9?

Câu 3: A là một tập hợp các bội số của 12 ít hơn 12. Làm thế nào nhiều yếu tố không tập A có?

Câu 4: Tìm dư khi chia cho 3. Câu 5: Cho rằng 511 là tổng của hai số nguyên tố và,. giá trị là gì?

Câu 6: Cho rằng. Tìm giá trị của.

Câu 7: Cho rằng. không số A có bao nhiêu ước?

Câu 8: Tìm số tự nhiên vì thế sản phẩm và 5 là số nguyên tố.

Câu 9: Cho rằng. không số A có bao nhiêu ước?

Câu 10: Cho rằng. Một số có bao nhiêu ước?

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TV
Trần Việt Anh
10 tháng 11 2016

Câu 1: Given that  is divisible by 9. What is the value of ? 
Câu 2: How many elements of the set A are divisible by 9?
Câu 3:A is a set of multiples of 12 less than 12. How many elements does the set A have?
Câu 4:Find the remainder when  is divided by 3.
Câu 5:Given that 511 is the sum of two prime numbers  and , . What is the value of ?
Câu 6:Given that . Find the value of .
Câu 7:Given that . How many divisors does the number A have?
Câu 8:Find the natural number  so that the product of  and 5 is a prime number.
Câu 9:
Given that . How many divisors does the number A have?
Câu 10:
Given that . How many divisors the number A have?

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NT
nguyen tien dung
4 tháng 12 2016
toan quoc te nhaQuestion 1:There are two parallel lines in the figure. What is the value of x?  Answer: x = Question 2:ABC and RTS are similar triangles.The value of x is Question 3:If x<0 and 5x+8+|3x|=0 then x=Question 4:I am a multiple of 70 between 400 and 600. My tens digit is odd. Who am I?Answer: Question 5:How many triples of integers (a,b,c) are there such that  ? Answer:  triples.Question 6:Each of the 37 students in the grade 8 at a school has one dog or one cat or both a dog and a...
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toan quoc te nha

Question 1:
There are two parallel lines in the figure. What is the value of x? 

 Answer: x = 

Question 2:


ABC and RTS are similar triangles.
The value of x is 

Question 3:
If x<0 and 5x+8+|3x|=0 then x=

Question 4:
I am a multiple of 70 between 400 and 600. My tens digit is odd. Who am I?

Answer: 

Question 5:
How many triples of integers (a,b,c) are there such that 
 ? 
Answer:  triples.

Question 6:
Each of the 37 students in the grade 8 at a school has one dog or one cat or both a dog and a cat. Twenty students have a dog and 24 students have a cat. 
How many students have both a dog and a cat?
Answer:  students.

Question 7:
The sum of 2 positive integer numbers is greater than their product if the smaller number is 

Question 8:
How many different real numbers satisfy the following equation?
 
Answer: 

Question 9:
The area of trapezoid ABCD is 180   .The altitude is 8 cm,AD is 10 cm,and BC is 17 cm.
What is AB,in centimeters?

Answer:  cm.

Question 10:
There are 115 cars in a village of 26 families. Each family has either 4 or 5 cars. 
How many families have 4 cars? 
 Answer:  families.
#Toán lớp 6
0
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