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OpenStudy (anonymous):
What is the discontinuity of the function f(x)=x^2-3x-28 over x+4 a. (-7,-14) b. (7,0) c. (4,-3) d. (-4,-11)
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OpenStudy (anonymous):
@eliassaab @whpalmer4
OpenStudy (anonymous):
The answer is d.
OpenStudy (ipwnbunnies):
Hehehe, shortcuts.
OpenStudy (anonymous):
Oh well..I actually didn't want the answer I wanna know how to do it but okay ':D ha..
OpenStudy (anonymous):
when you divide x^2 -3x -28 by x+ 4. x +4 will be in your denominator. Therefore, plugging in -4 in the new function would give you an undefined answer.
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OpenStudy (whpalmer4):
the discontinuities happen when the denominator equals 0.
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