sofia08753 sofia08753
  • 18-03-2020
  • Mathematics
contestada

given f(x)=x^2+5 and g(x)=2x^3-1 find (f/g)(-3)

Respuesta :

carlosego
carlosego carlosego
  • 26-03-2020

For this case we have the following functions:

[tex]f (x) = x ^ 2 + 5\\g (x) = 2x ^ 3-1[/tex]

By definition of composition of functions we have:

[tex](f / g) (x) = \frac {f (x)} {g (x)}[/tex]

Then substituting:

[tex]f (-3) = (- 3) ^ 2 + 5 = 9 + 5 = 14\\g (-3) = 2 (-3) ^ 3-1 = 2 (-27) -1 = -54-1 = -55[/tex]

So:

[tex](f / g) (- 3) = \frac {14} {- 55} = - 0.25[/tex]

Answer:

[tex](f / g) (- 3) = \frac {14} {- 55} = - 0.25[/tex]

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