Question Detail

MTH 102 MTH 102 Past Questions Objective Question

Question

Find the derivative of y(x) = log₂ x
Options
A X/e^alnX
B 1/(x ln a)
Correct Answer
C 1/(x log a)
D √a ln x
Correct Answer

Option B is the correct answer.

Detailed Explanation

The derivative of a logarithm with base 'b' is given by d/dx(log_b x) = 1 / (x ln b).In this case, the base b = 2. So, dy/dx = 1 / (x ln 2).Option B is 1 / (x ln a). If 'a' in the option represents the base of the logarithm in the question (which is 2), then this option is mathematically correct.

Hint

Use the change of base formula for logarithms or recall the derivative rule for log_b x.

Question Info