Find First Derivative: We need to find the second derivative of the function f(x)=ln(2x+4) with respect to x. The first step is to find the first derivative f′(x) using the chain rule.The chain rule states that if you have a composite function f(g(x)), then the derivative f′(x) is f′(g(x))⋅g′(x).In our case, f(g(x))=ln(2x+4), so g(x)=2x+4 and f(g(x))=ln(g(x)).Now we differentiate f(g(x)) with respect to x0 and then multiply by the derivative of x0 with respect to x.x3 since the derivative of x4 with respect to x0 is x6.x7 since the derivative of x8 with respect to x is f′(x)0.So, f′(x)1.
Simplify First Derivative: Now we simplify the first derivative f′(x).f′(x)=(2x+4)1×2=2x+42.We can simplify this further by dividing the numerator and the denominator by 2.f′(x)=x+21.
Find Second Derivative: Next, we find the second derivative f′′(x) by differentiating f′(x) with respect to x. The derivative of (x+2)1 with respect to x is found using the quotient rule or by recognizing it as a power of x. We can rewrite (x+2)1 as (x+2)−1 and then differentiate. Using the power rule, the derivative of (x+2)−1 with respect to x is f′(x)0, since the derivative of f′(x)1 with respect to x is f′(x)3. So, f′(x)4.
Simplify Second Derivative: We can leave the second derivative in its current form or simplify it further. f′′(x)=−1×(x+2)−2 can be rewritten as −(x+2)21.This is the simplified form of the second derivative.
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