+3 votes
in Class 10 by kratos

How many terms are there in the G.P. 5, 10, 20, 40,... 1280?

(a) 6

(b) 8

(c) 9

(d) 10

1 Answer

+1 vote
by kratos
 
Best answer

Correct option (c) 9

Explanation:

1280 = 5. 2n−1 or n − 1 = 8 or n = 9. Thus, there are total of 9 terms in the series.

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