mvazquez985266 mvazquez985266
  • 21-08-2020
  • Mathematics
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Composition of functions Find g (f(x)) for the following problems

Composition of functions Find g fx for the following problems class=

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WojtekR
WojtekR WojtekR
  • 21-08-2020

1.

[tex]f(x)=-3x\qquad g(x)=5x-6\\\\g(f(x))=5(-3x)-6=\boxed{-15x-6}[/tex]

2.

[tex]f(x)=x-6\qquad g(x)=x^2+6x-2\\\\g(f(x))=(x-6)^2+6(x-6)-2=x^2-12x+36+6x-36-2=\\\\=\boxed{x^2-6x-2}[/tex]

3.

[tex]f(x)=4x+3\qquad g(x)=2x^2-x+1\\\\g(f(x))=2(4x+3)^2-(4x+3)+1=2(16x^2+24x+9)-4x-3+1=\\\\=32x^2+48x+18-4x-3+1=\boxed{32x^2+44x+16}[/tex]

4.

[tex]f(x)=2x^2\qquad g(x)=8x^2+3x\\\\g(f(x))=8(2x^2)^2+3(2x^2)=8\cdot4x^4+6x^2=\boxed{32x^4+6x^2}[/tex]

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