Question

=-=

Answer 1

For the first one, you can see that there are 5 terms.

The first term is -3, and each subsequent term increases by 1.

\[\sum_{k=0}^{4} ({-3 + 1i})\]

See if you can do the next one

Answer 2

Sorry, I mixed i and k there. should be

\[\sum_{k=0}^{4} (-3 + 1k)\]

Answer 3

alternatively, you can write it as:

\[\sum_{k=1}^{5} (-4 + k)\]

Answer 4

4 n=1 (1+9)?

Answer 5

@slaaibak

Answer 6

Nope. The next one is a quadratic series, which means each term is n^2

So, in this one there are 6 terms. It would be best to start counting at k=1:

\[\sum_{k=1}^{6} k^2\]

Answer 7

Do you understand @coolaidd ?

Answer 8

yes.. thanks @slaaibak !

Answer 9

it's a pleasure.