Q. If −y2−y3−5x3=y then find dxdy in terms of x and y.Answer: dxdy=
Differentiate −y2: We are given the equation −y2−y3−5x3=y. 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 −y3: Differentiate the term −y2 with respect to x. Since y is a function of x, we use the chain rule: the derivative of y2 with respect to y is 2y, and then we multiply by dxdy (the derivative of y with respect to x).The differentiation gives us −y21.
Differentiate −5x3: Differentiate the term −y3 with respect to x. Using the chain rule again, the derivative of y3 with respect to y is 3y2, and then we multiply by (dy)/(dx).The differentiation gives us −3y2(dy)/(dx).
Differentiate y: Differentiate the term −5x3 with respect to x. Since x is the variable we are differentiating with respect to, we simply use the power rule: the derivative of x3 is 3x2.The differentiation gives us −15x2.
Combine and set equal: Differentiate the term y with respect to x. Since y is a function of x, the derivative is simply dxdy.The differentiation gives us dxdy.
Isolate (dy)/(dx): Combine all the differentiated terms and set the equation equal to the derivative of the right side of the original equation, which is 0 since the derivative of a constant is 0. So, we have −2y(dy)/(dx)−3y2(dy)/(dx)−15x2=(dy)/(dx).
Factor out (dy)/(dx): We need to solve for (dy)/(dx). To do this, we isolate terms containing (dy)/(dx) on one side of the equation.This gives us (dy)/(dx)−2y(dy)/(dx)−3y2(dy)/(dx)=15x2.
Divide to solve for (dxdy):</b>Factorout$(dxdy) from the left side of the equation.This gives us (dxdy)(1−2y−3y2)=15x2.
Divide to solve for (dy)/(dx): Factor out (dy)/(dx) from the left side of the equation.This gives us (dy)/(dx)(1−2y−3y2)=15x2.Divide both sides of the equation by (1−2y−3y2) to solve for (dy)/(dx).This gives us (dy)/(dx)=1−2y−3y215x2.