Question

For G. P. a = 1, r=2 then Sn
a) 20 b) 2 - 1 c) 2n + 1 d) 2n + 2​

Answer 1

Answer:

c) 2n+1

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Answer 2

Sum of infinite terms of GP=a/(1-r)

a=1

r=2

=1/(2-1)

=1

B option is correct

2-1=1