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Question

The sum to 2n terms of the series 53+4×63+73+4×83+93.....is ?

A

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B

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C

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D

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Solution

The correct option is C


At n=1
2n= 2
Sum to 2n terms = 125 + 864 = 989

Substitute n=1 in answer options. Only option c gives 989


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