alewiayos7sic alewiayos7sic
  • 21-11-2016
  • Mathematics
contestada

f the graph of y=ax+b/x+c has a horizontal asymptote y=2 and a vertical asymptote x=-3 then a+c=?
a)-3
b)-1
c)0
d)1
E)5 ...?

Respuesta :

alsteva alsteva
  • 22-11-2016
Correct answer is E.

[tex]y= \frac{ax+b}{x+c} \\ \\ \lim_{x \to \infty} \frac{ax+b}{x+c}=2 \\ \\ \lim_{x \to \infty} \frac{ \frac{ax}{x} + \frac{b}{x} }{ \frac{x}{x} + \frac{c}{x} }=2 \\ \\ \lim_{x \to \infty} \frac{a + \frac{b}{x} }{ 1 + \frac{c}{x} }=2 \\ \frac{a + 0}{ 1 + 0 }=2 \\ \\ \frac{a}{1} =2 \\a=2 \\ \\x+c=0 \\-3+c=0 \\c=3 \\ \\a+c=2+3=5 [/tex]
Answer Link
lunaar2
lunaar2 lunaar2
  • 29-07-2021

Answer: 5

Step-by-step explanation:

Lim x-> a (ax+b)/x+c = a you know that a=2

Since the limit of x ->-3 equals infinity, you know that x =3.

Thus a+c = 5

Answer Link

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