Question

x+2.x+3.x+4.x+...+100.x=6060

Answer 1

x+2x+3x+4x+...+100x=6060

x.(1+2+3+4+...+100) = 6060

x.5050 = 6060

x = 6/5

Answer 2

vt = X x (1+2+3+4+...+100)=6060

mà 1+2+3+...+100 = 100x(100+10) :2

=5050

thay vào vt =>5050X =6060 

vậy x =\(\frac{6}{5}\)

Answer 3

\(x.\left(1+2+3+...+100\right)=6060\)

\(x.5050=6060\)

\(x=\frac{6060}{5050}=\frac{6}{5}\)