Question

find the sum

$1 + 3 + \frac{1}{3} + \frac{1}{9} + \frac{1}{27} + \infty$
​

Answer 1

Answer is 9/2

Explanation

In this infinite series

a= 1

r=1/3. |r| < 1

sum of the given series is S+3 where S = 1/(1-r)

putting the value of r = 1/3

S=3/2

Sum of the given series is 9/2