Q. If xy+5y2−x3=0 then find dxdy in terms of x and y.Answer: dxdy=
Differentiation with Product Rule: We are given the equation xy+5y2−x3=0. To find dxdy, we will differentiate both sides of the equation with respect to x, using implicit differentiation.
Differentiation with Chain Rule: Differentiate xy with respect to x. Using the product rule, the derivative of xy with respect to x is y+xdxdy.
Differentiation of −x3: Differentiate 5y2 with respect to x. Since y is a function of x, we use the chain rule. The derivative of 5y2 with respect to x is 10ydxdy.
Combining Derivatives: Differentiate −x3 with respect to x. The derivative of −x3 with respect to x is −3x2.
Isolating (dxdy): Combine the derivatives from the previous steps to rewrite the differentiated equation: y+x(dxdy)+10y(dxdy)−3x2=0.
Isolating (dy)/(dx): Combine the derivatives from the previous steps to rewrite the differentiated equation: y+x(dy)/(dx)+10y(dy)/(dx)−3x2=0.Now, we need to solve for (dy)/(dx). First, move all terms not containing (dy)/(dx) to the other side of the equation: x(dy)/(dx)+10y(dy)/(dx)=3x2−y.
Isolating (dxdy):</b>Combinethederivativesfromthepreviousstepstorewritethedifferentiatedequation:$y+xdxdy+10ydxdy−3x2=0.Now, we need to solve for dxdy. First, move all terms not containing dxdy to the other side of the equation: xdxdy+10ydxdy=3x2−y.Factor out dxdy from the left side of the equation: dxdy(x+10y)=3x2−y.
Isolating (dy)/(dx): Combine the derivatives from the previous steps to rewrite the differentiated equation: y+x(dy)/(dx)+10y(dy)/(dx)−3x2=0.Now, we need to solve for (dy)/(dx). First, move all terms not containing (dy)/(dx) to the other side of the equation: x(dy)/(dx)+10y(dy)/(dx)=3x2−y.Factor out (dy)/(dx) from the left side of the equation: (dy)/(dx)(x+10y)=3x2−y.Divide both sides of the equation by (x+10y) to isolate (dy)/(dx): (dy)/(dx)=(3x2−y)/(x+10y).