How many terms are there in the GP 5, 20, 80, 320, ..., 20480 ?

1.	How many terms are there in the GP 5, 20, 80, 320, ..., 20480 ?
A.	7
B.	6
C.	5
D.	10
Answer» B. 6

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How many terms are there in the GP 5, 20, 80, 320, ..., 20480 ?

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