Q. If 5y3+y=−y2−2x2+x3 then find dxdy in terms of x and y.Answer: dxdy=
Differentiate with chain rule: First, we need to differentiate both sides of the equation with respect to x. The left side of the equation involves y, which is a function of x, so we will use the chain rule to differentiate it. The right side of the equation only involves x, so we will differentiate it normally.
Differentiate left side: Differentiate the left side of the equation with respect to x: dxd(5y3+y). Using the chain rule, this becomes 15y2(dxdy)+(dxdy).
Differentiate right side: Differentiate the right side of the equation with respect to x: dxd(−y2−2x2+x3). This becomes −2dxdyy−4x+3x2.
Combine differentiated terms: Now we have the following equation after differentiation: 15y2(dxdy)+(dxdy)=−2(dxdy)y−4x+3x2.
Factor out common term: Combine the terms involving dxdy on one side of the equation: 15y2(dxdy)+(dxdy)+2(dxdy)y=3x2−4x.
Solve for dxdy: Factor out dxdy from the left side of the equation: (dxdy)(15y2+1+2y)=3x2−4x.
Solve for dxdy: Factor out dxdy from the left side of the equation: (dxdy)(15y2+1+2y)=3x2−4x. Solve for dxdy: dxdy=15y2+1+2y3x2−4x.