5n6qwdywmn 5n6qwdywmn
  • 24-06-2021
  • Mathematics
contestada

for f(x)=2x+1 and g(x2-7 find f/g (x)

for fx2x1 and gx27 find fg x class=

Respuesta :

joaobezerra joaobezerra
  • 29-06-2021

Answer:

Option c.

Step-by-step explanation:

We are given these following functions:

[tex]f(x) = 2x + 1[/tex]

[tex]g(x) = x^2 - 7[/tex]

Division:

The division of those functions is:

[tex]\frac{f}{g}(x) = \frac{2x + 1}{x^2-7}[/tex]

Domain:

We have a fraction, so we have to take the domain of the function in consideration. The denominator cannot be 0, thus:

[tex]x^2 - 7 \neq 0[/tex]

[tex]x^2 \neq 7[/tex]

[tex]x \neq \pm \sqrt{7}[/tex]

Thus, the correct answer is given by option C.

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