Question

the 7th term of a g. p is 8times the 4th term. it's 5th term is 48 . find first term and common ratio​

Answer 1

Step-by-step explanation:

ANSWER

Let the series be a,ar,ar

2

⋯

⟹ar

6

=8ar

3

r

3

=8

⟹r=

3

8

r=2

⟹ar

4

=48

a(2)

4

=48

16a=48

⟹a=3

So the series is

3,3×2,3×2

2

,......⟹3,6,12,.....