Q. For the following equation, find f′(x).f(x)=4x2−3x−9Answer: f′(x)=
Apply Power Rule: To find the derivative of the function f(x)=4x2−3x−9, we will use the power rule for differentiation. The power rule states that the derivative of xn with respect to x is n⋅x(n−1).
Differentiate 4x2: Applying the power rule to the first term 4x2, we differentiate it as follows:The derivative of 4x2 with respect to x is 2⋅4⋅x(2−1)=8x.
Differentiate −3x: Next, we apply the power rule to the second term −3x, which is a linear term. The derivative of −3x with respect to x is simply the coefficient of x, which is −3.
Differentiate −9: The third term −9 is a constant, and the derivative of a constant is 0.
Combine Derivatives: Combining the derivatives of all three terms, we get the derivative of the function f(x):f′(x)=8x−3+0
Simplify Final Result: Simplifying the expression, we see that the "+ 0" is unnecessary and can be omitted. The final derivative of the function f(x) is: f′(x)=8x−3
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