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Question

The third term of a geometric progression is 4. The product of the first five terms is

A
43
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B
44
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C
45
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D
46
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Solution

The correct option is C 45
Let a and r the first term and common ratio, respectively.
Given:Third term=ar2=4
Product of first 5 terms is
=a.ar.ar2.ar3.ar4
=a5r10
=(ar2)5
=45

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