Question

.

Answer 1

\[\sum_{k=1}^5(k-6)^3\] like that?

Answer 2

Yes

Answer 3

put \(k=1\) and get the first term of \((1-6)^3=(-5)^3=-125\)

Answer 4

that eliminates A and C

Answer 5

then put \(k=2\) and get \((2-6)^3=-4^3=-64\)

Answer 6

which pretty much gives only one possible answer from your choices