2 years ago

4. Evaluate the geometric series given a1 = 4, r = -2 and n = 12

Mathematics

1 answer:

katrin2010 [14]2 years ago

3 0

we know that

a1=7

r=2

n=14

then

Sn=a1*[(r^n)-1]/(r-1)-------------->S14= 7*[(2^14)-1]/(2-1)=114681

the answer is 114681

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