Question

How many terms are there in the GP 5, 20, 80, 320........... 20480?
A.5
B.6
C.8
D.9

Answer 1

the correct answer is B.6 . if u like it follow me

Answer 2

Answer:

Step-by-step explanation:

Common ratio, r = 205

= 4

Last term or nth term of GP = arn - 1

20480 = 5 × (4n - 1)

Or, 4n - 1 = 204805

 = 48

So, comparing the power,

Thus, n - 1 = 8

Or, n = 7

Number of terms = 7