Unit 1 Review -
(2.) Find f(g(x)) and g(f(x)) given f(x)= 3x+7 and g(x)= 1/3x - 5
(show step by step)
f(g(x))=f(13x−5)=3(13x−5)+7=3+21x−353x−5)=21x−323x−5)g(f(x))=g(3x+7)=13(3x+7)−5=19x+16f(g(x))=f(\frac{1}{3x-5})\\ =3(\frac{1}{3x-5})+7\\ =\frac{3+21x-35}{3x-5})\\ =\frac{21x-32}{3x-5})\\ g(f(x))=g(3x+7)\\ =\frac{1}{3(3x+7)-5}\\ =\frac{1}{9x+16}f(g(x))=f(3x−51)=3(3x−51)+7=3x−53+21x−35)=3x−521x−32)g(f(x))=g(3x+7)=3(3x+7)−51=9x+161
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