Q. If −x−xy=−y3 then find dxdy in terms of x and y.Answer: dxdy=
Differentiate with respect to x: We are given the equation −x−xy=−y3. To find dxdy, we need to differentiate both sides of the equation with respect to x, treating y as a function of x (implicit differentiation).Differentiate both sides of the equation with respect to x:dxd(−x−xy)=dxd(−y3)This gives us:−1−(x⋅dxd(y)+y⋅dxd(x))=−3y2⋅dxd(y)Simplify the differentiation:−1−(x⋅dxdy+y⋅1)=−3y2⋅dxdy
Simplify the expression: Now we have an equation with dxdy terms that we can solve for dxdy: −1−xdxdy−y=−3y2dxdy Rearrange the terms to isolate dxdy on one side: xdxdy+3y2dxdy=−1+y Factor out dxdy from the left side: dxdy(x+3y2)=−1+y
Isolate dxdy: Finally, divide both sides by (x+3y2) to solve for dxdy:dxdy=x+3y2−1+yThis is the derivative of y with respect to x in terms of x and y.
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