Problem

Consider the following. \[ 4 x^{5}+y^{3}=9 x \] (a) Find $y^{\prime}$ by implicit differentiation. \[ y^{\prime}= \] (b) Solve the equation explicitly for $y$ and differentiate to get $y^{\prime}$ in terms of $x$. \[ y^{\prime}= \] (c) Check that your solutions to parts (a) and (b) are consistent by substituting the expression for $y$ into your solution for part (a). \[ y^{\prime}= \]

Solution

Step 1 :Differentiate both sides of the equation \(4x^5 + y^3 = 9x\) with respect to x. The derivative of a sum of terms is the sum of the derivatives of each term. The derivative of a constant times a function is the constant times the derivative of the function. The derivative of x to the power of n is n times x to the power of n-1. The derivative of y with respect to x is denoted as y'.

Step 2 :Applying these rules, we get \(20x^4 + 3y^2y' = 9\).

Step 3 :Solving this equation for y', we get \(y' = \frac{9 - 20x^4}{3y^2}\).

Step 4 :\(\boxed{y' = \frac{9 - 20x^4}{3y^2}}\) is the final answer.

From Solvely APP
Source: https://solvelyapp.com/problems/7464/

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