How to Add and Subtract Functions? (+FREE Worksheet!)
The Absolute Best Books to Ace Pre-Algebra to Algebra II Adding and Subtracting Functions – Example 1: \(g(a)=a-1, f(a)=a+5\), Find: \((g+f)(-1)\) Solution: \((g+f)(a)=g(a)+f(a)\), then: \((g+f)(a)=a-1+a+5=2a+4\)Substitute \(a \) with \(-1: (g+f)(-1)=2a+4=2(-1)+4=-2+4=2 \) Adding and Subtracting Functions – Example 2: \(f(x)=3x-3, g(x)=x-5\), Find: \((f-g)(3)\) Solution: \((f-g)(x)=f(x)-g(x)\), then: \((f-g)(x)=3x-3-(x-5)=3x-3-x+5 =2x+2\)Substitute \(x\) with \(3: (f-g)(3)=2x+2=2(3)+2=6+2=8\) Adding and Subtracting Functions […]