Higher Order Derivatives
Easymathematics
If y = x⁴, then d²y/dx² equals
Select the correct option:
Solution
Incorrect! Answer:
12x²
- First Derivative (y′): Apply power rule once.
- dxdy=4x3.
- Second Derivative (y′′): Differentiate the first derivative again.
- dx2d2y=dxd(4x3)
- Apply power rule again: 4⋅(3x3−1)=12x2.
- Result: y′′=12x2.
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About This Question
- Subject
- mathematics
- Chapter
- limit, continuity and differentiability
- Topic
- higher order derivatives
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
12x²
- First Derivative (y′): Apply power rule once.
- dxdy=4x3.
- Second Derivative (y′′): Differentiate the first derivative again.
- dx2d2y=dxd(4x3)
- Apply power rule again: 4⋅(3x3−1)=12x2.
- Result: y′′=12x2.
This easy difficulty mathematics question is from the chapter limit, continuity and differentiability, covering the topic of higher order derivatives. It appeared in the 2025 exam.
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