Math Problem Statement

If g(x) = 2x − |5 + x|, find g(10) and g(−7).

Solution

The function given is:

g(x)=2x5+xg(x) = 2x - |5 + x|

We need to evaluate this function for two values: g(10)g(10) and g(7)g(-7).

Step 1: Calculate g(10)g(10)

Substitute x=10x = 10 into the function:

g(10)=2(10)5+10g(10) = 2(10) - |5 + 10| g(10)=2015g(10) = 20 - |15| Since 15=15|15| = 15, we have: g(10)=2015=5g(10) = 20 - 15 = 5

Step 2: Calculate g(7)g(-7)

Substitute x=7x = -7 into the function:

g(7)=2(7)5+(7)g(-7) = 2(-7) - |5 + (-7)| g(7)=1457g(-7) = -14 - |5 - 7| g(7)=142g(-7) = -14 - |-2| Since 2=2|-2| = 2, we have: g(7)=142=16g(-7) = -14 - 2 = -16

Final Answers:

g(10)=5g(10) = 5 g(7)=16g(-7) = -16

Would you like more details on the steps? Here are five related questions to explore further:

  1. How would the function behave for negative values of xx?
  2. What happens if the absolute value term is removed? How does the function change?
  3. Can you graph the function g(x)=2x5+xg(x) = 2x - |5 + x| for a range of values?
  4. What is the domain and range of g(x)g(x)?
  5. How does the function behave as xx approaches positive and negative infinity?

Tip: The absolute value function is piecewise. Understanding how it behaves for different signs of xx can help when solving more complex equations!

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value
Linear Functions

Formulas

g(x) = 2x − |5 + x|
Absolute value: |a| = a if a >= 0, -a if a < 0

Theorems

Properties of Absolute Value

Suitable Grade Level

Grades 8-10