04-01-2021
Mathematics

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Find [f g](x) if g(x) = x + 1 and f(x) = 2x ^ 2 - 5x + 8

Find f gx if gx x 1 and fx 2x 2 5x 8 class=

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Аноним Аноним

05-01-2021

Answer:

[tex]2x^{2}[/tex] - x + 5

Step-by-step explanation:

g(x)=x+1

f(x)=[tex]2x^{2}[/tex]-5x+8

f∅g(x)=2[tex](x+1)^{2}[/tex]-5(x+1) + 8

= 2([tex]x^{2}[/tex]+2x+1) - 5x - 5 + 8

= [tex]2x^{2}[/tex] +4x +2 - 5x +3

=[tex]2x^{2}[/tex] -x +5

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