Q. 135.0( 1 Vote )

Mark the correct A. 1/4

B. 1/2

C. 2

D. 4

Answer :

Let the GP be a,ar,ar2

Sum of infinite terms is given by

Also according to the question ar =2

Substituting in above equation

8(a-2) =a2

a2-8a+16 = 0

(a-4)2 = 0

a =4.

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