The functions m(x) and n(x) are differentiable. The function z(x) is defined as: z(x)=n(x)m(x) If m(7)=3, m′(7)=−2, n(7)=5, and n′(7)=3, what is z′(7)? Simplify any fractions. z′(7)=
Q. The functions m(x) and n(x) are differentiable. The function z(x) is defined as: z(x)=n(x)m(x) If m(7)=3, m′(7)=−2, n(7)=5, and n′(7)=3, what is z′(7)? Simplify any fractions. z′(7)=
Given function: We are given the function z(x)=n(x)m(x) and we need to find the derivative of z at x=7, which is z′(7). To do this, we will use the quotient rule for derivatives, which states that if z(x)=v(x)u(x), then z′(x)=(v(x))2u′(x)v(x)−u(x)v′(x). Here, u(x)=m(x) and v(x)=n(x).
Quotient rule for derivatives: We are given m(7)=3, m′(7)=−2, n(7)=5, and n′(7)=3. We will substitute these values into the quotient rule formula.
Substituting given values: Using the quotient rule, we get z′(7)=(n(7))2m′(7)n(7)−m(7)n′(7).
Performing multiplication: Substituting the given values, we get z′(7)=(5)2((−2)(5)−(3)(3)).
Adding numerator: Performing the multiplication, we get z′(7)=25−10−9.
Final result: Adding the numbers in the numerator, we get z′(7)=25−19.
Final result: Adding the numbers in the numerator, we get z′(7)=25−19. The fraction cannot be simplified further, so z′(7)=−2519.
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