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Question: Answered & Verified by Expert
If $2 \mathrm{x}^{3}-3 \mathrm{y}^{2}=7$, what is $\frac{\mathrm{dy}}{\mathrm{dx}}$ equal to $(\mathrm{y} \neq 0)?$
MathematicsApplication of DerivativesNDANDA 2013 (Phase 1)
Options:
  • A $\frac{\mathrm{x}^{2}}{2 \mathrm{y}}$
  • B $\frac{\mathrm{x}}{2 \mathrm{y}}$
  • C $\frac{\mathrm{x}^{2}}{\mathrm{y}}$
  • D None of the above
Solution:
1202 Upvotes Verified Answer
The correct answer is: $\frac{\mathrm{x}^{2}}{\mathrm{y}}$
Let $2 x^{3}-3 y^{2}=7$
Differentiate both side, w.r.t. 'x'
$6 x^{2}-6 y \frac{d y}{d x}=0$
$\Rightarrow \frac{d y}{d x}=\frac{x^{2}}{y}$

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