Q. Using implicit differentiation, find dxdy.−5y3−2x4+3x+3y+xy=2
Apply Differentiation Rules: We will differentiate each term of the equation with respect to x, remembering to use the product rule for the term xy and the chain rule for terms involving y, since y is a function of x.
Differentiate −5y3: Differentiate −5y3 with respect to x. Since y is a function of x, we get −5×3y2×(dxdy)=−15y2×(dxdy).
Differentiate −2x4: Differentiate −2x4 with respect to x. This is a straightforward differentiation, yielding −2×4x3=−8x3.
Differentiate 3x: Differentiate 3x with respect to x. The derivative of 3x with respect to x is 3.
Differentiate 3y: Differentiate 3y with respect to x. Since y is a function of x, we get 3×(dxdy).
Differentiate xy: Differentiate xy with respect to x using the product rule. The product rule states that dxd(uv)=u(dxdv)+v(dxdu), where u=x and v=y. So we get y⋅1+x⋅(dxdy)=y+x(dxdy).
Differentiate Constant: Differentiate the constant 2 with respect to x. The derivative of a constant is 0.
Combine Differentiated Terms: Combine all the differentiated terms to form the new equation: −15y2⋅dxdy−8x3+3+3dxdy+y+xdxdy=0.
Collect Terms on Each Side: Now, we collect all terms involving dxdy on one side and the rest on the other side. This gives us −15y2⋅dxdy+3dxdy+xdxdy=8x3−3−y.
Factor out dxdy: Factor out dxdy from the terms on the left side of the equation to get dxdy(−15y2+3+x)=8x3−3−y.
Solve for (dxdy):</b>Solvefor$(dxdy) by dividing both sides of the equation by (−15y2+3+x). This gives us (dxdy)=−15y2+3+x8x3−3−y.
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