How many terms are there in the GP 5, 20, 80, 320........... 20480?
A.5
B.6
C.8
D.9
Answers
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the correct answer is B.6 . if u like it follow me
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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
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