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March 5, 2015

March 5, 2015

Posted by **Lindsay** on Tuesday, August 20, 2013 at 4:45pm.

f(x)= (x^2-x-12)/(x^2-6x+8)

I just don't understand how to find the intervals. Thanks~

- Math -
**Reiny**, Tuesday, August 20, 2013 at 9:51pmf(x)= (x^2-x-12)/(x^2-6x+8)

= (x-4)(x+3)/( (x-2)(x-4)

= (x+3)/(x-2) , x not= 4

So the function is discontinuous at x=4 and at x = 2

with a "hole" at (4, 7/2)

and a vertical asymptote at x = 2

So continuous for

x<2 OR x > 2, x not= 4

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