Math, asked by rohitsharma941478, 8 months ago

48. The coefficient of x^7 in the polynomial expansion of
(1 + 2x – x2)4 is
(1) 8
(2) 12
(3) 14
(4) -12
(Andhra Pradesh, Stage-I, 2014-15)

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Answered by rohithreddy2001

1

Answer:

please refer the attachment

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