Question

Geometric Sequence?

Answer 1

I don't agree with your answer to the first one, are you sure you summed only the first six terms?

Answer 2

\[(-4)+(24)+(-6*24)+(-6*-6*24)+(-6*-6*-6*24)+(-6*-6*-6*-6*24)\]

Answer 3

I agree with 26,600

Answer 4

sum no n terms in GP= a*(1-r^n)/(1-r)
where a is first term, r is common factor

Answer 5

I agree with you on 29524 for #13

Answer 6

Okay, awesome! Good I understand at least some with these sequences!