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ap calculus

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Find the discontinuities of f(x)= ((x^2)+5x+6)/((x^2)-4)and categorize them as removable or non removable.

  • ap calculus -

    Start by finding the zeroes of the denominator.

  • ap calculus -

    since x^2+5x+6 = (x+2)(x+3)
    and x^2-4 = (x+2)(x-2)

    f(x) = (x+3)/(x-2) for x ≠ -2

    so, x = -2 is a removable discontinuity,
    x = 2 is a nonremovable discontinuity

    extra credit: how do we remove the discontinuity at x = -2?

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