The functions p(x) and q(x) are differentiable. The function r(x) is defined as: r(x)=q(x)p(x)If p(3)=2, p′(3)=−1, q(3)=4, and q′(3)=2, what is r′(3)? Simplify any fractions. r′(3)= _____
Q. The functions p(x) and q(x) are differentiable. The function r(x) is defined as: r(x)=q(x)p(x)If p(3)=2, p′(3)=−1, q(3)=4, and q′(3)=2, what is r′(3)? Simplify any fractions. r′(3)= _____
Apply Quotient Rule: To find r′(3), we need to use the quotient rule for differentiation, which states that if r(x)=q(x)p(x), then r′(x)=(q(x))2p′(x)q(x)−p(x)q′(x). We will apply this rule using the given values for p(3), p′(3), q(3), and q′(3).
Calculate Numerator: First, we calculate the numerator of the quotient rule: p′(3)q(3)−p(3)q′(3). Substituting the given values, we get: (−1)(4)−(2)(2).
Calculate Denominator: Performing the multiplication, we find the numerator to be: −4−4=−8.
Find r′(3): Next, we calculate the denominator of the quotient rule: (q(3))2. Substituting the given value for q(3), we get: (4)2.
Simplify Fraction: Calculating the square, we find the denominator to be: 16.
Simplify Fraction: Calculating the square, we find the denominator to be: 16.Now, we can find r′(3) by dividing the numerator by the denominator: r′(3)=16−8.
Simplify Fraction: Calculating the square, we find the denominator to be: 16.Now, we can find r′(3) by dividing the numerator by the denominator: r′(3)=−168.Simplifying the fraction, we get: r′(3)=−21.