Find the functions (a) f g, (b) gf, (c) ff, and (d) gg and their domains. f(x)

Question:

Find the functions

(a) f° g,

(b) g°f,

(c) f°f, and

(d) g°g

and their domains.

f(x) = √x + 1,       g(x) = 4x – 3

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