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The coefficient of x in the expansion of (x + 3)3 is (A) 1 (B) 9 (C) 18 (D) 27 |
Answer» (d) 27 Now, (x + 3)3 = x3 + 33 + 3x (3)(x + 3) = x3 + 27 + 9x (x + 3) = x3 +27 + 9x2+27x Hence, the coefficient of x in (x + 3)3 is 27. |
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