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![](https://rs.olm.vn/images/avt/0.png?1311)
(x + 1) + (x + 2) + (x + 3) + ... + (x + 1000) = 5750
<=> 100x + (1 + 2 + 3 + ... + 100) = 5750
<=> 100x + (1 + 100) x 50 = 5750
<=> 100x + 101 x 50 = 5750
<=> 100x + 5050 = 5750
<=> 100x = 5750 - 5050
<=> 100x = 700
<=> x = 7
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: \(\left(x+1\right)+\left(x+2\right)+...+\left(x+1000\right)=5750\)
\(\Leftrightarrow1000x+500500=5750\)
\(\Leftrightarrow x=-\dfrac{1979}{4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bạn xem lại đề hộ mình với,mình nghĩ chỗ cuối là x+100 nếu đúng là x+1000 thì làm như sau:
(X+1)+(X+2)+(x+3)+........+(x+1000)=5750
1000x+ (1+2+3+.......+1000)= 5750
1000x+ 500500= 5750
1000x = 5750 - 500500
1000x= -494750
x= -494750 : 1000
x= -494, 75
Vậy x = -494, 75
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có : \(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+1000\right)=5750\)
\(\Leftrightarrow1000x+\left(1+2+...+1000\right)=5750\)
\(\Leftrightarrow1000x+\frac{1001.1000}{2}=5750\)
\(\Leftrightarrow1000x=\frac{5750}{500500}=\frac{23}{2002}\)
\(\Leftrightarrow x=\frac{23}{2002000}\)
(x+1)+(x+2)+...+(x+1000)=5750
=>x.1000+(1+2+3+...+1000)=5750
=>x.1000+[(1000+1).1000:2]=5750
=>1000x+(1001000:2)=5750
=>1000x+500500=5750
=>1000x=5750-500500=-494750
=>x=-494750:1000=-494,75
Có lẽ đúng >: ko chắc :P
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có:(x+x+x+...x)+(1+2+3+..+1000)=5750
Cậu tính số lượng Số của từng cái 1 rồi tinh bình thương nhha
Sls x=sls(1+2+3+...+1000)
a) Dễ quá làm mỏi tay
b) (x + 1) + (x + 2) + (x + 3) + ... + (x + 1000) = 5750
\(\Rightarrow\)(x + x + x + ... + x) + [(1000 + 1) . 1000 : 2] = 5750 (1000 số x)
\(\Rightarrow\)1000x + 500500 = 5750
\(\Rightarrow\)x = -494,75
![](https://rs.olm.vn/images/avt/0.png?1311)
x+x+x+...x+ 1+2+3+...100 = 5750
100.x + 101.50 = 5750
100.x = 5757-5050
100.x = 700
x = 700: 100
x = 7
![](https://rs.olm.vn/images/avt/0.png?1311)
(x+1)+(x+2)+(x+3)+...+(x+100)=5750
x + 1 + x + 2 + x + 3 + .... + x + 100 = 5750
(x + x + x + ... + x) + (1 + 2 + 3 + ... + 100) = 5750
100x + 5050 = 5750
100x = 5750 - 5050 = 700
x = 700 : 100 = 7
(x+1)+(x+2)+(x+3)+...+(x+100)=5750
x + 1 + x + 2 + x + 3 + .... + x + 100 = 5750
(x + x + x + ... + x) + (1 + 2 + 3 + ... + 100) = 5750
100x + 5050 = 5750
100x = 5750 - 5050 = 700
x = 700 : 100 = 7
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: (x + 1) + (x + 2) +...+ (x + 100) = 5750
=> (x + x + x +...... +x) + (1 + 2 + 3 + 4 + ... + 100) = 5750
=> 100x + 5050 = 5750
=> 100x = 5750 - 5050
=> 100x = 700
=> x = 700 : 100
=> x = 7
Ta có: ( x+1) + (x+2) + (x+3) +...+ ( x+100) = 5750
<=> ( x + x + x + ...... + x ) + (1 + 2 + 3 + ..... + 100) = 5750
<=> 100x + 5050 = 5750
=> 100x = 5750 - 5050
=> 100x = 700
=> x = 700 : 100
=> x = 7
(x + 1) + (x + 2) + (x + 3) + .... + (x + 100) = 5750
=> 100x + (1 + 2 + 3 + ... + 100) = 5750
=> 100x + 5050 = 5750
=> 100x = 5750 - 5050
=> 100x = 700
=> x = 700 : 100
=> x = 7
HỌC TỐT
(x + 1) + (x + 2) + (x + 3) + .... + (x + 100) = 5750
=> 100x + (1 + 2 + 3 + ... + 100) = 5750
=> 100x + 5050 = 5750
=> 100x = 5750 - 5050
=> 100x = 700
=> x = 700 : 100
=> x = 7
chúc hok tốt!!! ^_^