Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
I call the number of students didn't take part in Mathemas Competition in class A & B are a & b respectively
(with condition: a & b \(\in\)N*)
,From the theme, we have: \(\frac{1}{3}b+a=\frac{1}{5}a+b\)(Because rhe number of students in 2 class is the same)
\(\Leftrightarrow\frac{b}{3}-b+a-\frac{a}{5}=0\Leftrightarrow\left(-\frac{2b}{3}\right)+\frac{4a}{5}=0\)
\(\Leftrightarrow\frac{4a}{5}-\frac{2b}{3}=0\Leftrightarrow\frac{12a-10b}{15}=0\Leftrightarrow12a=10b\)
\(\Rightarrow\frac{a}{b}=\frac{10}{12}=\frac{5}{6}\)
So the ratio of the number of student didn't take part of Class A & B is \(\frac{5}{6}.\)
1. The stars
2. The second
3. When there is a hole in it
4. In a dictionary
5. Because they can't live without water
6. Eggs
A Kid in King Arthur’s Court is directed by Michael Gottlieb. The main character in the film is a teenager called Calvin Fuller. Calvin is played by Thomas Ian Nicholas. This film is a modern retelling of Mark Twain’s classic book Connecticut Yankee.
Calvin lives in California, USA. He is a very shy boy and he is not very good at sports. At the beginning of the film, Calvin is playing baseball when there is a terrible earthquake. A hole opens in the ground and Calvin falls through it. He lands in the past, in the time of King Arthur.
Calvin meets King Arthur and Merlin, the wizard. King Arthur is played by Joss Ackland and Merlin is played by Ron Moody. They think that Calvin is amazing because he plays them modern music on his CD player and he shows them how to make rollerblades and a mountain bike. Calvin is trained to be a knight and he becomes more confident. Calvin helps King Arthur to beat his enemy, Lord Belasco, and then Merlin sends Calvin back to the future. Calvin finds himself back in the baseball game, but this time he wins the game.
The special effects in A Kid in King Arthur’s Court are very good. Michael Gottlieb is a great director and the actors’ performances are good. The film is funny and exciting. It’s a comedy, a drama, and an action film all in one.
a: \(A=31x^2y^3-2xy^3+\dfrac{1}{4}x^2y^2+2\)
\(B=2xy^3+\dfrac{3}{4}x^2y^2-31x^2y^3-x^2-5\)
P=\(A+B=x^2y^2-x^2-3\)
\(A-B=62x^2y^3-4xy^3-\dfrac{1}{2}x^2y^2+x^2+7\)
b: Khi x=6 và y=-1/3 thì \(P=\left(6\cdot\dfrac{-1}{3}\right)^2-6^2-3=4-36-3=1-36=-35\)
a) \(P\left(x\right)=2xy^2+4x^2y-x^2y+3xy^2+1\)
\(P\left(x\right)=\left(2xy^2+3xy^2\right)+\left(4x^2y-x^2y\right)+1\)
\(P\left(x\right)=5xy^2+3x^2y+1\)
a,P(x)=(2xy^2+3xy^2)+(4x^2y-x^2y)+1
=5xy^2+3x^2y+1
b,Để tìm nghiệm cho đa thức ta giả sử đa thức đó = 0
p(x)=5xy^2+3x^2y+1
=> 5xy^2+3x^2y+1=0
tự phân tích r tìm ra
x + 2xy -2y -1 = 5-1
x(2y+1) - (2y+1) = 4
(x-1).(2y+1)=4
Vì đề không nói x/y thuộc N hay Z nên cho tam số tự nhiên nhé :)
Vì 2y+1 là số lẻ, mà 2y+1 thuộc ước của 4 ⇒2y+1=1⇒y=0
⇒x-1=4⇒x=5
.VuxBachs.