Question

Help please???
Find S5 for the series -2 + -10 + -50 + -250 +...

Answer 1

what's the r?

Answer 2

I think its 5?

Answer 3

yes it is 5. you have the first 4 terms. What's the 5th?

Answer 4

-1250?

Answer 5

right. S5 is the first 5 terms added together

Answer 6

so is -1250 the answer? if not could you explain how to get it?

Answer 7

-1250 is the first term.
S5 means the sum of the first 5 terms, so
S5 = -2 + -10 + -50 + -250 + -1250

Answer 8

so I just need to add them together?

Answer 9

yes

Answer 10

okay I got -1562. Is that right?

Answer 11

yes

Answer 12

Thank you <3