Find the requested function value fx 8x 2 gx 3x2 5x 4 F

Find the requested function value. f(x) = 8x - 2, g(x) = -3x^2 - 5x - 4 Find (g compositefunction f) (-9). For the pair of functions, find the indicated composition. f(x) = 4x + 15, g(x) = 3x - 1 Find (f compositefunction g)(x).

Solution

f(x) = 4x + 15.

g(x) = 3x - 1.

Find fog(x).

fog(x) means we will write g(x) in place of \"x\" in f(x).

fog(x) = 4*g(x) + 15.

          = 4*(3x - 1) + 15

          = 12x - 4 + 15

          = 12x + 11