Chain Rule Explanation: To find the derivative of the function f(x)=8x2+2x−3, we will use the chain rule. The chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function.
Define Inner and Outer Functions: Let's denote the inner function as u(x)=8x2+2x−3. The outer function is the square root function, which we can write as v(u)=u. We need to find the derivatives v′(u) and u′(x).
Find Derivative of Outer Function: The derivative of the outer function v(u)=u with respect to u is v′(u)=2u1.
Find Derivative of Inner Function: The derivative of the inner function u(x)=8x2+2x−3 with respect to x is u′(x)=16x+2.
Apply Chain Rule: Now we apply the chain rule: dxdf(x)=v′(u)⋅u′(x). Substituting the derivatives we found, we get dxdf(x)=2u1⋅(16x+2).
Substitute Derivatives: Substitute back u with 8x2+2x−3 to express the derivative in terms of x: dxdf(x)=28x2+2x−31⋅(16x+2).
Simplify Expression: Simplify the expression: dxdf(x)=28x2+2x−316x+2.
Final Derivative: Further simplify the expression by dividing the numerator and the denominator by 2: dxdf(x)=8x2+2x−38x+1.
More problems from Add, subtract, multiply, and divide polynomials