Question

Find the sum of the following series : 2 + 6 + 18 + ………. up to 6 terms.
please refer to some special sequences before you answer.

Answer 1

Answer:

728

Step-by-step explanation:

this is a geometric progression.

first term,a=2

common ratio,r=3

sum=a(r^n-1)/r-1

=2(3^6-1)/3-1

=2(729-1)/2

=728