Identify Function: We are given the function h(x)=3x2. To find the derivative h′(x), we will use the chain rule. The chain rule states that if you have a composite function f(g(x)), the derivative is f′(g(x))⋅g′(x). In this case, our outer function f(u) is 3u and our inner function g(x) is x2.
Derivative of Outer Function: First, we need to find the derivative of the outer function f(u)=3u with respect to u. We can rewrite this function as u31, and using the power rule, we find that the derivative f′(u)=31u−32.
Derivative of Inner Function: Next, we find the derivative of the inner function g(x)=x2. Using the power rule, the derivative g′(x)=2x.
Apply Chain Rule: Now we apply the chain rule. We multiply the derivative of the outer function by the derivative of the inner function. This gives us h′(x)=f′(g(x))⋅g′(x)=(31)(x2)−32⋅2x.
Combine Terms: We simplify the expression by combining the terms. The x in 2x cancels out one of the x's in (x2)−32, leaving us with h′(x)=31×2×x−31=32x−31.
Simplify Expression: Finally, we can rewrite the expression with a positive exponent by moving x−1/3 to the denominator, which gives us h′(x)=32/x1/3.
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