Question

I need help with sigma notations!

Answer 1

OMG I LOVE SIGMA NOTATION

Answer 2

i don't get this please help

Answer 3

Okay so you have a sequence that starts at n_1 and ends at n_7

Answer 4

Are we finding the sum?

Answer 5

idk the question is in the attachment

Answer 6

evaluating it so yeah i think

Answer 7

Anyways, you have 7 terms in this sequence.

Answer 8

how do i know that?

Answer 9

It starts at n_1 and ends at n_7. 1,2,3,4,5,6,7 that is 7 terms. Okay?

Answer 10

I'm sorry. i just don't see where i start with 7. i thought n-1 made it like 2,3,4,5,6,7 or something idk