Q. If −2x−5y2+4+5x3=0 then find dxdy in terms of x and y.Answer: dxdy=
Given Equation: We are given the equation −2x−5y2+4+5x3=0 and we need to find the derivative of y with respect to x, which is denoted as dxdy. To do this, we will use implicit differentiation, which involves taking the derivative of both sides of the equation with respect to x, while treating y as a function of x.
Implicit Differentiation: First, we differentiate each term of the equation with respect to x. The derivative of −2x with respect to x is −2. The derivative of −5y2 with respect to x is −10y(dxdy), using the chain rule because y is a function of x. The derivative of 4 with respect to x is −2x1, since it is a constant. The derivative of −2x2 with respect to x is −2x4.
Differentiating Terms: Now we write down the differentiated equation: −2−10ydxdy+0+15x2=0.
Write Down Differentiated Equation: Next, we solve for dxdy. To do this, we isolate the term containing dxdy on one side of the equation. We get −10ydxdy=2−15x2.
Solve for (dxdy):</b>Now,wedividebothsidesoftheequationby$−10y to solve for (dxdy). This gives us (dxdy)=−10y2−15x2.
Divide to Solve for (dxdy): We have found the derivative of y with respect to x in terms of x and y, which is (dxdy)=−10y2−15x2.