\(B=2^3+4^3+6^3+...+20^3\)
\(=2.\left(1^3+2^3+3^3+...+10^3\right)\)
\(=2.3025\)
\(=6050\)
Ta có B = 23 + 43 + 63 + ... + 203
= 23.(13 + 23 + 33 + ... + 103)
= 23.3025
= 8. 3025
= 24200
ta có: B= (2 X1)^3 + ( 2 x 2)^2 + (2x3)^3 + ...+ (10x2)^3
B= 2^3(1 + 2^3 +...+ 10^3)
mà 1 + 2^3 +..+10^3=3025
=> B= 8 x 3025
B= 24200
^ là mũ