Please elaborate little bit.What happens if you factor out \(2^3\) from the second sum?
Yes, clear now. Thank you.The second sum is of the form:
[MATH]S=\sum_{k=1}^{10}\left((2k)^3\right)[/MATH]
If we factor, as I suggested, we get:
[MATH]S=2^3\sum_{k=1}^{10}\left(k^3\right)[/MATH]
Can you proceed, using the information given in the problem regarding the second factor, which is a sum?