crownmarie123 crownmarie123
  • 20-12-2017
  • Mathematics
contestada

1.) IF f(x)=3x-5 and g(x)=x^2, find (fxg)(3)

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altavistard
altavistard altavistard
  • 26-12-2017
Please use * to denote mult. here, not "x."  "x" is your variable and cannnot also be a symbol for mult.

f(x)g(x) = 3x^3 - 5x^2.

Now let x = 3:

(f*g)(3) = 3(3)^3 - 5(3)^2 = 81-45 =  36  (answer)
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