Question

The sum of first eight terms of gp is 82 times the sum of first four terms. The common ratio of gp is

Answer 1

Answer:4

Step-by-step explanation:S

n

=

r−1

a(r

n

−1)

5=

S

4

S

8

5=

r

4

−1

r

8

−1

5=r

4

+1

4=r

4

4

4

=r

∴r=

4

4