Question 13
DifferentiationFind limx→3 (x + 3)/(x2 − x − 12)
- A.−1
- B.−1/7
- C.1/7
- D.1
Show the answer and explanation
Answer: A (−1)
Explanation
The denominator is not zero at x = 3, so substitute: (3 + 3)/(9 − 3 − 12) = 6/(−6) = −1.
Find limx→3 (x + 3)/(x2 − x − 12)
Answer: A (−1)
The denominator is not zero at x = 3, so substitute: (3 + 3)/(9 − 3 − 12) = 6/(−6) = −1.