calculus

find the x-values at which f is not continuous. which of the discontinuities are removable?
f(x)=1/(x^2+1)

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asked by rachael
  1. the function is not continuous when the denominator is zero, or...

    0 = x^2+1

    solving for x then

    x = i

    It is a removable discontinuity since it can be repaired by replacing a single point.

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    posted by Fredr

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