Question

If the 5th & 10th term of GP 32 & 1024, find term 15?​

Answer 1

Step-by-step explanation:

The given G.P. has first term a=5 and the common ratio r=2. Let the nth term be 5120. Then,

a

n

=5120

ar

n−1

=5120

5(2

n−1

)=5120

2

n−1

=1024

2

n−1

=2

10

n−1=10

n=11