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Question

Find the middle term in the expansion of (2x3+32x)10.

A
210
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B
630
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C
252
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D
756
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Solution

The correct option is D 252
The middle term will be the 6th term. It will also be the only term independent of x.
Hence the coefficient will be
T5+1=10C5
=10!5!(5!)
=252

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