What is the limit ?

Answer and explanation

Correct answer: A.

  1. Step 1: Recall the standard limit .
  2. Step 2: Let .
  3. Step 3: Rewrite expression: .
  4. Step 4: Evaluate limit: (or apply L'Hopital's rule twice: ).
Answer
8.
Why not the others: '' omits one factor of 2; '' fails to divide by 2; '' uses unscaled standard limit.

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