(x+1)+(x+2)+(x+3)+......+(x+100)=5750
X+. (1+2+3+...+100) = 5750
Suy ra: 1+2+3+...+100
có số các số hạng là:(100-1):1+1=100 số hạng
tổng trên là :(100+1).100:2=5050
như vậy ta có phép tính: X+5050=5750
X = 5750-5050
X = 700
Vậy x = 700
(x+1)+(x+2)+(x+3)+........+(x+100)=5750
(x+x+...+x)+(1+2+3+...+100)=5750
(x.100)+(1+100).100:2=5750
(x.100)+5050=5750
x.100=5750-5050
x.100=700
x =700:100
x = 7
Vậy x=7
tong tu 1 den 100 la 5050
lay 5750 tru cho 5050 bang 700
lay 700 chia cho 100 bang 7
(x+1)+(x+2)+(x+3)+.............+(x+100)=5750
(x+x+x+.......+x)+(1+2+3......+100)=5750
100x +101*100/2=5750
100x+5050=5750
100x=5750-5050
100x=700
x=700/100
x=7
(x+1)+(x+2)+(x+3)+...+(x+100)
=(x+x+...)+(1+2+3+4+...+100)
=x.100+(1+100x100:2)
=x.100+5050=5750
x.100=5750-5050
x.100=700
x=700:100
vậy x=7
\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+100\right)=5750\)
\(\left(x+x+x+...+x\right)+\left(1+2+3+...100\right)=5750\)
\(x\cdot100+\left(100+1\right)\cdot100:2=5750\)
\(x\cdot100+5050=5750\)
\(x\cdot100=5750-5050\)
\(x\cdot100=200\)
\(x=200:100\)
\(x=2\)
100x + (100+1).[(100-1)+1] : 2 = 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
<=> 100x+(1+2+3+...+100)=5750
<=> 100x + (1+100)*100/2=5750
<=> 100x+ 5050 =5750
<=> x= (5750-5050)/100
<=> x=7
Vậy x=7
Bài làm
(x+1)+(x+2)+(x+3)+........+(x+100)=5750
(x+x+...+x)+(1+2+3+...+100)=5750
x.100+(1+100).100:2=5750
x.100+5050=5750
x.100=5750-5050
x.100=700
x =700:100
x = 7
Vậy x=7
P/s tham khảo nha
\(\left(x+1\right)\left(x+2\right)\left(x+3\right).......\left(x+100\right)=5750\)
\(\left(x+x+x+.....+x\right)\left(1+2+3+....+100\right)=5750\)
\(100x+\left(1+100\right).100:2=5750\)
\(100x+101.50=5750\)
\(100x+5050=5750\)
\(100x=5750-5050=700\)
\(\Rightarrow x=\frac{700}{100}=7\)
Chỉ ghi đáp số mà không có lời giải đâu nhé!Câu trả lời đúng là 7.
(x+1)+(x+2)+(x+3)+...+(x+100)=5750
(x+x+...+x)+(1+2+3+...+100)=5750
(x.100)+(1+100).100:2=5750
(x.100)+5050=5750
x.100=5750-5050
x.100=700
x=700:100=7
Vậy x=7.
(x + 1) + (x + 2) + (x + 3) +........+ (x + 100) = 5750
(x + x +...+ x) + (1 + 2 + 3 + ... + 100) = 5750
x.100 + (1 + 100).100 : 2 = 5750
x.100 + 5050 = 5750
x.100 = 5750 - 5050
x.100 = 700
x = 700 : 100
x = 7
vậy_
( x + 1 ) + ( x + 2 ) + ( x + 3 ) + .... + ( x + 100 ) = 5750
( x + x + x + .... + x ) + ( 1 + 2 + 3 + ... + 100 ) = 5750
100x + [( 100 + 1 ) x 100 : 2] = 5750
100x + [101 x 100 : 2] = 5750
100x + [10100 : 2] = 5750
100x + 5050 = 5750
100x = 5750 - 5050
100x = 700
x = 700 : 100
x = 7
Vậy x = 7
(x+1)+(x+2)+(x+3)+........+(x+100)=5750
x.100 +(1+2+...+100)=5750
x.100 +[ (100+1).100]:2=5750
x.100+5050=5750
x.100 =700
x=7
vậy x =7
(x+1)+(x+2)+(x+3)+...+(x+100)=5750
= 100x + (1+2+...+100) = 5750
=> x = [ 5750 - (1+2+...+100) ]/100
=> x = (5750 - 5050) / 100
=> x = 7
Vậy x=7
(x+1)+(x+2)+(x+3)+........+(x+100)=5750
x.100 +(1+2+...+100)=5750
x.100 +[ (100+1).100]:2=5750
x.100+5050=5750
x.100 =700
x=7
vậy x =7
