1. **Problem Statement:** Given the equation $$x^2 y = \sin y = 3x$$, find $$\frac{dy}{dx}$$ using implicit differentiation.
2. **Step 1: Understand the equation**
The equation as given is ambiguous because it uses two equal signs. Assuming the problem means $$x^2 y + \sin y = 3x$$.
3. **Step 2: Differentiate both sides with respect to $$x$$**
Using implicit differentiation:
- Differentiate $$x^2 y$$ using the product rule: $$\frac{d}{dx}(x^2 y) = 2x y + x^2 \frac{dy}{dx}$$
- Differentiate $$\sin y$$: $$\cos y \frac{dy}{dx}$$
- Differentiate $$3x$$: $$3$$
4. **Step 3: Write the differentiated equation**
$$2x y + x^2 \frac{dy}{dx} + \cos y \frac{dy}{dx} = 3$$
5. **Step 4: Group terms with $$\frac{dy}{dx}$$**
$$x^2 \frac{dy}{dx} + \cos y \frac{dy}{dx} = 3 - 2x y$$
6. **Step 5: Factor out $$\frac{dy}{dx}$$**
$$\frac{dy}{dx} (x^2 + \cos y) = 3 - 2x y$$
7. **Step 6: Solve for $$\frac{dy}{dx}$$**
$$\frac{dy}{dx} = \frac{3 - 2x y}{x^2 + \cos y}$$
**Final answer:**
$$\boxed{\frac{dy}{dx} = \frac{3 - 2x y}{x^2 + \cos y}}$$
Implicit Differentiation 7Ae60C
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