Answer and explanation

Correct answer: B.

  1. Step 1: Observe that the numerator is exactly the derivative of the denominator: .
  2. Step 2: Apply standard logarithmic integration rule: .
  3. Step 3: Thus the integral is .
Answer
\ln|x^2 + 3x + 5| + C.
Why not the others: '' treats it as power rule with exponent -1; '' introduces an unneeded factor of 2; '' introduces an erroneous coefficient of 1/2.

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