Question

1³+2³+3³+4³+5³+6³+7³+8³​

Answer 1

Step-by-step explanation:

Formula for 1^3 + 2^3 + 3^3 + ……….. + n^3 is given as:

[n(n+1)/2]^2

So, 1^3 + 2^3 + 3^3 + 4^3 + 5^3 + 6^3 + 7^3

= [7*(7+1)/2]^2

= [7*8/2]^2

= 28^2

= 784

Answer 2

Step-by-step explanation:

1+8+27+64+125+216+343+512

1296