4 years ago

NEED HELP ASAP

Mathematics

1 answer:

ANEK [815]4 years ago

8 0

I don't understand life anymore....

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Mkey [24]

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Step-by-step explanation:

Since, the sum of GP is,

$S_{n}=\frac{a(r^n-1)}{r-1}$

where r is the common ratio,

a is the first term,

n is the number of term,

Here, series is, 6, -12, 24, -48, _ _ _ _

Which is a GP ( Because there is common ratio in the given consecutive terms )

So, for the above series, a = 6, r = $\frac{6}{-12}=-2$ and n = 7,

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⇒ $S_{7}=\frac{6(-129)}{-3}$

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here is the answer babe. Feel free to ask for more help

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