algebra 1.docx

f(x)=3x+1

g(x)=5x

(g-f)(x)=g(x)-f(x)=5x-(3x+1)=5x-3x-1= 2x-1

(g.f)(x)=g(x).f(x)=(3x+1)5x=15x^2 + 5x

(g+f)(4)=g(4)+f(4)=5*4+3*4+1=20+12+1=33

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