Question

find the sum of gp 4,2,1, 1/2

.... upto 10 terms. please help fast​

Answer 1

Answer:

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Step-by-step explanation:

Clearly the given series is G.P with common ratio r=−2 and first term a=2

Also, n=10

Sn be sum of first n terms of G.P

Formula for sum of n terms of G .P is given by 

Sn=r−1a(rn−1)

S10=−2−12×([−2]10−1)=3−2046=−682