Question

Giúp e vs ạ

Answer 1

\(A=\left(1.100\right)^2+\left(2.100\right)^2+\left(3.100\right)^2+...+\left(10.100\right)^2\)

\(=1^2.100^2+2^2.100^2+3^2.100^2+...+10^2.100^2\)

\(=100^2.\left(1^2+2^2+3^2+...+10^2\right)\)

\(=10000.385\)

\(=3850000\)

Answer 2

\(100^2+200^2+300^2+...+1000^2=1^2.100^2+2^2.100^2+3^2.100^2+...+10^2.100^2=\left(1^2+2^2+3^2+...+10^2\right).100^2=385.100^2=3850000\)