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Question

The coefficient of x in the expansion of (x+3)3 is
(a) 1 (b) 9 (c) 18 (d) 27

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Solution

ANSWER:
(x+3)3
=x3+33+9x(x+3)
=x3+27+9x2+27x
So, the coefficient of x in (x+3)3 is 27.
Hence, the correct answer is the option (d).


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