Q. If −2y2−x=2y3+x3 then find dxdy in terms of x and y.Answer: dxdy=
Differentiate Left Side: We are given the equation −2y2−x=2y3+x3. 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 Right Side: Differentiate the left side of the equation with respect to x: −2y2−x. The derivative of −2y2 with respect to x is −4ydxdy because y is a function of x. The derivative of −x with respect to x is −1.
Combine Differentiated Equations: Differentiate the right side of the equation with respect to x: 2y3+x3. The derivative of 2y3 with respect to x is 6y2(dxdy) because y is a function of x. The derivative of x3 with respect to x is 3x2.
Solve for dxdy: Now we have the differentiated equation: −4ydxdy−1=6y2dxdy+3x2.
Move Terms to Respective Sides: We need to solve for dxdy. To do this, we'll move all the terms involving dxdy to one side of the equation and the rest to the other side. This gives us −4ydxdy−6y2dxdy=3x2+1.
Combine Like Terms: Combine like terms involving dxdy on the left side: −4ydxdy−6y2dxdy becomes (−4y−6y2)dxdy.
Isolate (dxdy):</b>Nowwehave$(−4y−6y2)(dxdy)=3x2+1. To isolate (dxdy), divide both sides by (−4y−6y2).
Isolate (dxdy):</b>Nowwehave$(−4y−6y2)(dxdy)=3x2+1. To isolate (dxdy), divide both sides by (−4y−6y2).After dividing, we get (dxdy)=−4y−6y23x2+1.
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