Find the term independent of in the expansion of .

Answer and explanation

Correct answer: B.

  1. Step 1: The general term is .
  2. Step 2: Independent of when , so ; the term is .
Answer
.
Why not the others: is what you get if you ignore the constant . is what you get if you pick the wrong value of . is what you get if you use to the first power only.

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