Question Detail

MTH 102 MTH 102 Past Questions Objective Question

Question

Find the derivative of y = 3 log(x - 1)
Options
A x-1
B 1/(3(x-1))
C 3/(x-1)
Correct Answer
D 3e^(x-1)
Correct Answer

Option C is the correct answer.

Detailed Explanation

Assuming 'log' refers to the natural logarithm (ln):y = 3 ln(x - 1).Using the chain rule, dy/dx = 3 * d/dx(ln(x - 1))dy/dx = 3 * (1 / (x - 1)) * d/dx(x - 1)dy/dx = 3 * (1 / (x - 1)) * 1 = 3 / (x - 1).

Hint

Recall the derivative of ln(u) is u'/u.

Question Info