Question

If the third term of a $G.P.$ is $3$, then the product of its first $5$ terms is

• A. 15
• B. $81$
• C. $243$
• D. Cannot be determined

Answer 1

Answer: (C)

Given third term of GP is, $a=3.$
Product of first 5 terms
$=a{r}^2\times ar\times a\times \frac{a}{r}\times \frac{a}{r^2}$
$=a^5$
$={(3)}^5$
$=243$