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cynone8254
06.07.2019 •
Mathematics
What are the discontinuities of the function f(x) = the quantity x squared minus 36 over the quantity 4x plus 24?
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Ответ:
there is a point discontinuity ( hole ) at (- 6, - 3 )
factor the numerator/denominator
f(x) =![\frac{(x-6)(x+6)}{4(x+6)}](/tpl/images/0057/5641/a31e9.png)
the factor (x + 6) cancels leaving the simplified version of f(x)
f(x) =![\frac{x-6}{4}](/tpl/images/0057/5641/b00e1.png)
the removal of the factor (x + 6) from the numerator/denominator means there is a discontinuity at x + 6 = 0 , that is x = - 6
f(- 6 ) =
= - 3
there is a point discontinuity ( hole ) at (- 6, - 3 )
Ответ: