Evaluate .

Answer and explanation

Correct answer: A.

.
  1. Step 1: Divide numerator and denominator by the highest power of , which is :
  2. Step 2: As , and .
  3. Step 3: Evaluate the limit of the constants: .
Answer
.
Why not the others: '' applies if the denominator degree is higher; '' applies if numerator degree is higher; '' uses the linear coefficient of the numerator.

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