Question

The
common ratio of
a finite GP
is 3 and its last
last term is 486.
If the
sum of these terms is 728
Find the first tem,​

Answer 1

Step-by-step explanation:

Hey mate, here is your answer.

By using the formula, S=lr-a/r-1

S=728

l=486

r=3

a=?

728=486×3-a/3-1

728×2=486×3-a

1456 = 1458-a

a = 1458-1456

a=2

is your answer.

Hope it will help you.