Question

\[\sum_{k=1}^{4}(k+7)^{2}\]
what are the terms of the series?

Answer 1

k=1 (k+7)^2=64
k=2 (k+7)^2=81
k=3 (k+7)^2=100
k=4 (k+7)^2=121

Total: 366

What do you mean by "series?"

Answer 2

replace \(k\) successively by \(1,2,3,4\) and see what you get

Answer 3

to add, stick a plus sign between them