CUET · MATHS · PYQ PAPER 2023
If \(y = x^2 \log_e x\), then \(\frac{d^2y}{dx^2}\) is equal to:
- A \(5+x \log _e x\)
- B \(3+2 \log _e x\)
- C \(3+2 x \log _e x\)
- D \(x\left(1+2 \log _e x\right)\)
Answer & Solution
Correct Answer
(B) \(3+2 \log _e x\)
Step-by-step Solution
Detailed explanation
\( \frac{dy}{dx} = \frac{d}{dx}(x^2 \log_e x) = 2x \log_e x + x^2 \cdot \frac{1}{x} = 2x \log_e x + x \) \( \frac{d^2y}{dx^2} = \frac{d}{dx}(2x \log_e x + x) = (2 \log_e x + 2x \cdot \frac{1}{x}) + 1 \) \( \frac{d^2y}{dx^2} = 2 \log_e x + 2 + 1 = 3 + 2 \log_e x \)
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