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# C2 Geometric Sequence question Watch

1. Hello,

I was wondering if anyone could offer some guidance for part c of the attatched question. I understand that i must use the sum formula

S30= 12([2^2]^30 -1) / 3

But where do i go from here?

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2. (Original post by AindowJ)
Hello,

I was wondering if anyone could offer some guidance for part c of the attatched question. I understand that i must use the sum formula

S30= 12([2^2]^30 -1) / 3

But where do i go from here?

A hint. What is ?
You can use one of your rules of indices to simplify
3. (Original post by Kvothe the arcane)
A hint. What is ?
You can use one of your rules of indices to simplify
Yeah Ive just realised where I was going wrong. Thanks
5. (Original post by AindowJ)
You can't so I've closed it for you

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