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Question

If the middle term in the expansion of (p2+2)8 is 1120, then the value of p is

A
±2
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B
±4
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C
±1
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D
±6
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Solution

The correct option is A ±2
Middle term of the given expansion will be 82+1=5th term

T4+1= 8C4(p2)4×241120=8×7×6×54×3×2×1×(p4)p=±2

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