Question 38
DifferentiationFind limx→3 ((x3 + x2 − 12x)/(x2 − 9)).
- A.7/2
- B.0
- C.7/−2
- D.−7
Show the answer and explanation
Answer: A (7/2)
Explanation
x(x + 4)(x − 3)/((x − 3)(x + 3)) = x(x + 4)/(x + 3) → 3 × 7/6 = 7/2.
Find limx→3 ((x3 + x2 − 12x)/(x2 − 9)).
Answer: A (7/2)
x(x + 4)(x − 3)/((x − 3)(x + 3)) = x(x + 4)/(x + 3) → 3 × 7/6 = 7/2.