Q. If −4+5x3=y3+4x2y then find dxdy in terms of x and y.Answer: dxdy=
Differentiate with respect to x: Differentiate both sides of the equation with respect to x. We will use the power rule for differentiation and the product rule for the term 4x2y. Differentiate the left side: dxd(−4+5x3)=0+15x2 Differentiate the right side using the chain rule for y3 and the product rule for 4x2y: dxd(y3+4x2y)=3y2dxdy+4(2xy+x2dxdy)
Set derivatives equal: Set the derivatives from both sides equal to each other.15x2=3y2dxdy+4(2xy+x2dxdy)
Combine like terms: Distribute and combine like terms. 15x2=3y2dxdy+8xy+4x2dxdy
Isolate terms: Isolate terms with dxdy on one side and the rest on the other side.15x2−8xy=3y2(dxdy)+4x2(dxdy)
Factor out dy/dx: Factor out dxdy from the right side of the equation.15x2−8xy=dxdy(3y2+4x2)
Solve for dxdy: Solve for dxdy by dividing both sides by (3y2+4x2).dxdy=3y2+4x215x2−8xy
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