Question Detail

MTH 102 MTH 102 Past Questions Objective Question

Question

Differentiate the function y = x² + 1/x²
Options
A 2x - √x
B 2x - 2√x
C 2x - 2/x³
Correct Answer
D 2x - 1/x³
Correct Answer

Option C is the correct answer.

Detailed Explanation

First, rewrite the function using negative exponents: y = x² + x⁻².Now, apply the power rule for differentiation (d/dx(xn) = nxn-1) to each term:dy/dx = d/dx(x²) + d/dx(x⁻²)dy/dx = 2x2-1 + (-2)x-2-1dy/dx = 2x + (-2)x⁻³dy/dx = 2x - 2/x³This matches option C.

Hint

Rewrite 1/x² as x-2 and then apply the power rule for differentiation.

Question Info