Question

Which of the following are geometric series?

Answer 1

first is the geometric series

EXPLANATION

a geometric series is a sequence of numbers whose first term is non zero and each of the succeeding terms is equal to the Prcedding term multiply by a constant number.

if a = first term

and constant number = d

then

GP is given by

a,a r , a r^2 ,a r^3 .............and so on

in first

a = 1/2

and d = 1/2

and hence it is an GP

Answer 2

1 and 4

Explanation: