Alvinmariano17viz
Answered

What is the (f.g)(x) if f(x)=2x+1 and g(x)=x-4?

Sagot :

Kaiusviz
If you're asking for (f • g)(x), which is the product: (f • g)(x) = (2x + 1)(x - 4) = 2x^2 - 8x + x - 4 = 2x^2 - 7x - 4. If you're asking for (f ○ g)(x), which is the composite of the 2 functions: (f ○ g)(x) = 2(x - 4) + 1 = 2x - 8 + 1 = 2x - 7.
Riza1viz
[tex]f(x)=2x+1, \ \ \ g(x)=x-4 \\\\(f\cdot g )(x )=f(x)\cdot g(x)=(2x+1)(x-4)=2x^2-8x+x-4=2x^2-7x-4[/tex]