Question

Tim x biet (x+1)+(x+2)+(x+3)........+(x+100)=5750

Answer 1

=100.x + (1+2+3+....+100 )

=100.x +100.101/2

=>100x +101 + 50 =5750

100x =5750 -5050 =700

=>700 :100 = 7

Vậy X = 7

Answer 2

[x+1]+[x+2]+...+[x+100]=5750

[1+2+...+100].x=5750

Số các số hạng:

(100-1):1+1=100 số

=>có 100 thừa số x

Tổng trên là:

(1+100)x100:2=5050

=>x.100=5750-5050

=>x.100=700

=>x=700:100

=>x=7

Vậy x = 7

Answer 3

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

Answer 4

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

Answer 5

X=7 100% bạn ơi

Answer 6

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

Answer 7

\(=100.x+\left(1+2+3+...+100\right)\)

\(=100x+100.\frac{101}{2}\)

\(=>100x+101+50=5750\)

\(100x=5750-5050=700\)

\(=>x=700:100=7\)

Vậy x là 7.

~ Hok tốt ~