Q. Given the function f(x)=−3(4x2+6x)6, find f′(x) in any form.Answer: f′(x)=
Identify Functions: To find the derivative of the function f(x)=−3(4x2+6x)6, 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.
Derivative of Outer Function: First, let's identify the outer function and the inner function. The outer function is u6 where u=4x2+6x, and the inner function is 4x2+6x. We will need to take the derivative of both.
Derivative of Inner Function: The derivative of the outer function u6 with respect to u is 6u5. We will later substitute u with 4x2+6x.
Apply Chain Rule: The derivative of the inner function 4x2+6x with respect to x is 8x+6. This is obtained by using the power rule for each term separately.
Simplify Expression: Now, we apply the chain rule. The derivative of 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. This gives us:f′(x)=6×(−3)×(4x2+6x)5×(8x+6).
Final Derivative: Simplify the expression by multiplying the constants and combining like terms: f′(x)=−18×(4x2+6x)5×(8x+6).
Final Derivative: Simplify the expression by multiplying the constants and combining like terms: f′(x)=−18×(4x2+6x)5×(8x+6). The final form of the derivative is: f′(x)=−18(4x2+6x)5(8x+6).
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