Find the sum of the GP :
……to 8 terms
Sum of a G.P. series is represented by the formula, , when |r|<1. ‘Sn’ represents the sum of the G.P. series upto nth terms, ‘a’ represents the first term, ‘r’ represents the common ratio and ‘n’ represents the number of terms.
Here,
a =
r = (ratio between the n term and n-1 term)
n = 8 terms
∴
⇒
⇒
⇒
∴