Q. For the following equation, find f′(x).f(x)=7x4−6x2−1Answer: f′(x)=
Apply Power Rule: To find the derivative of the function f(x)=7x4−6x2−1, 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).
Derivative of 7x4: Apply the power rule to the first term 7x4. The derivative of 7x4 with respect to x is 4⋅7⋅x4−1=28x3.
Derivative of −6x2: Apply the power rule to the second term −6x2. The derivative of −6x2 with respect to x is 2⋅(−6)⋅x2−1=−12x.
Derivative of constant: The third term −1 is a constant, and the derivative of a constant is 0.
Combine derivatives: Combine the derivatives of all terms to get the derivative of the entire function f(x). This gives us f′(x)=28x3−12x+0.
Simplify final derivative: Simplify the expression by removing the +0 at the end, as it does not affect the value of the derivative. The final derivative is f′(x)=28x3−12x.
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