Q. Find the derivative of the function f(x)=ln(x2−3x+2).
Identify Functions: To find the derivative of the function f(x)=ln(x2−3x+2), 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.
Find Outer and Inner: First, let's identify the outer function and the inner function. The outer function is g(u)=ln(u), and the inner function is u(x)=x2−3x+2.
Derivative of Outer: The derivative of the outer function g(u)=ln(u) with respect to u is u1. We will apply this after we find the derivative of the inner function.
Derivative of Inner: Now, let's find the derivative of the inner function u(x)=x2−3x+2. The derivative of x2 is 2x, the derivative of −3x is −3, and the derivative of a constant like 2 is 0.
Combine Inner Derivative: Combining the derivatives of the terms in the inner function, we get u′(x)=2x−3.
Apply Chain Rule: Now we can apply the chain rule. The derivative of the function f(x) with respect to x is the derivative of the outer function evaluated at the inner function times the derivative of the inner function.f′(x)=g′(u(x))⋅u′(x)
Substitute Derivatives: Substituting the derivatives we found, we get:f′(x)=x2−3x+21⋅(2x−3)
Simplify Expression: Simplifying the expression, we leave it as is because it is the simplest form for the derivative of the given function.f′(x)=x2−3x+22x−3
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