6Given rx x24x5x3 a Find the xintercepts b Find the yinterc
6)Given r(x) = x^2-4x-5/x-3
a) Find the x-intercept(s)
b) Find the y-intercept.
c) Find the asymptotes. Label the asymptotes as vertical, horizontal or slant asymptote.
Solution
f(x)= (x2-4x-5)/(x-3)
a. x- intercept
To find the x- intercept,we have to plug f(x)=0
(x2-4x-5)/(x-3)=0
(x-5)(x+1)=0
x=5,-1
Therefore x-intercepts are (5,0),(-1,0)
b. y-intercept
To find the y-intercept,we have to plug x=0
y=(0-4(0)-5)/(0-3)= 5/3
Therefore y intercept is (0,5/3)
c. Vertical asymptote
TO find VA,we have to set the bottom to zero
x-3=0
x=3
There is no horizontal asymptote
And to find the slant asymptote we have to divide numerator by the denominator
y=(x2-4x-5)/(x-3)
y= (x-1) -8/(x-3)
Slant asymptote,y= x-1
