Apply Quotient Rule: To find the derivative of the function f(x)=x3+2x2−3x4x, we will use the quotient rule. The quotient rule states that if we have a function that is the quotient of two functions, v(x)u(x), then its derivative is given by (v(x))2v(x)u′(x)−u(x)v′(x).
Identify u(x) and v(x): First, let's identify u(x) and v(x). Here, u(x)=4x and v(x)=x3+2x2−3x. We will need to find the derivatives of both u(x) and v(x), which are u′(x) and v′(x) respectively.
Find u′(x): The derivative of u(x)=4x with respect to x is u′(x)=4, since the derivative of x with respect to x is 1.
Find v′(x): Now, let's find the derivative of v(x)=x3+2x2−3x. We will use the power rule, which states that the derivative of xn with respect to x is n∗x(n−1).
Apply Power Rule: Applying the power rule to each term of v(x), we get:v′(x)=dxd(x3)+dxd(2x2)−dxd(3x) = 3x2+4x−3.
Calculate v′(x): Now that we have u′(x) and v′(x), we can apply the quotient rule to find the derivative of f(x):f′(x)=(v(x))2v(x)u′(x)−u(x)v′(x)=(x3+2x2−3x)2(x3+2x2−3x)(4)−(4x)(3x2+4x−3).
Apply Quotient Rule: Let's simplify the numerator of the derivative:Numerator = 4x3+8x2−12x - 12x3+16x2−12x = 4x3+8x2−12x−12x3−16x2+12x = −8x3−8x2.
Simplify Numerator: Now we have the simplified numerator and the denominator. The derivative of f(x) is: f′(x)=(x3+2x2−3x)2−8x3−8x2.
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