Question

Sum of the series $3,9,27,...$ upto $6$ terms

• A. $512$
• B. $1092$
• C. $364$
• D. $728$

Answer 1

The correct option is B $1092$

The given series is G.P. with $a=3,r=3$

Sum $=\frac{a(r^n-1)}{r-1}$
$=\frac{3(3^6-1)}{3-1}=1092$