Math Problem Statement

Calculate h'(2) for functions h(x) based on given f'(2) = 12 and g'(2) = -1.

Solution

Let's go through the problem step by step to compute h(2)h'(2) for each function h(x)h(x), given the information:

  • f(2)=12f'(2) = 12
  • g(2)=1g'(2) = -1

(A) h(x)=4f(x)h(x) = 4f(x)

Using the chain rule: h(x)=4f(x)h'(x) = 4f'(x) Thus, h(2)=4f(2)=412=48h'(2) = 4 \cdot f'(2) = 4 \cdot 12 = 48.

(B) h(x)=13g(x)h(x) = -13g(x)

h(x)=13g(x)h'(x) = -13g'(x) Thus, h(2)=13g(2)=13(1)=13h'(2) = -13 \cdot g'(2) = -13 \cdot (-1) = 13.

(C) h(x)=10f(x)+13g(x)h(x) = 10f(x) + 13g(x)

h(x)=10f(x)+13g(x)h'(x) = 10f'(x) + 13g'(x) Thus, h(2)=10f(2)+13g(2)=1012+13(1)=12013=107h'(2) = 10 \cdot f'(2) + 13 \cdot g'(2) = 10 \cdot 12 + 13 \cdot (-1) = 120 - 13 = 107.

(D) h(x)=12g(x)7f(x)h(x) = 12g(x) - 7f(x)

h(x)=12g(x)7f(x)h'(x) = 12g'(x) - 7f'(x) Thus, h(2)=12g(2)7f(2)=12(1)712=1284=96h'(2) = 12 \cdot g'(2) - 7 \cdot f'(2) = 12 \cdot (-1) - 7 \cdot 12 = -12 - 84 = -96.

(E) h(x)=8f(x)+3g(x)2h(x) = 8f(x) + 3g(x) - 2

The derivative of the constant 2-2 is zero: h(x)=8f(x)+3g(x)h'(x) = 8f'(x) + 3g'(x) Thus, h(2)=8f(2)+3g(2)=812+3(1)=963=93h'(2) = 8 \cdot f'(2) + 3 \cdot g'(2) = 8 \cdot 12 + 3 \cdot (-1) = 96 - 3 = 93.

(F) h(x)=8g(x)7f(x)10xh(x) = -8g(x) - 7f(x) - 10x

The derivative of 10x-10x is 10-10: h(x)=8g(x)7f(x)10h'(x) = -8g'(x) - 7f'(x) - 10 Thus, h(2)=8g(2)7f(2)10=8(1)71210=88410=86h'(2) = -8 \cdot g'(2) - 7 \cdot f'(2) - 10 = -8 \cdot (-1) - 7 \cdot 12 - 10 = 8 - 84 - 10 = -86.

If you have any questions or need further details, feel free to ask!

Follow-up questions:

  1. What is the significance of using the chain rule in these derivative calculations?
  2. How would the answers change if the derivatives f(2)f'(2) and g(2)g'(2) had different values?
  3. Why does the derivative of a constant term, like in (E), not affect the result?
  4. Can you explain why f(2)f'(2) and g(2)g'(2) are essential for these calculations?
  5. How do different coefficients (like the 4 in 4f(x)4f(x)) affect the derivative of h(x)h(x)?

Tip:

When dealing with combinations of functions in derivative problems, always apply the chain rule and product rule carefully to avoid mistakes.

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Math Problem Analysis

Mathematical Concepts

Derivatives
Chain Rule

Formulas

h'(x) = cf'(x) for h(x) = cf(x)
h'(x) = c1f'(x) + c2g'(x) for h(x) = c1f(x) + c2g(x)

Theorems

Differentiation Rules
Linear Combination of Derivatives

Suitable Grade Level

Advanced High School or Early College