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TI 84 will not show entire graph

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Trying to graph f(x) = 1/sqrt(x^2 - 4).  The graph doesn't show any values for above about y=2.  Any ideas?
asked Sep 16, 2018 by anonymous

1 Answer

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For x values between -2 <= x <= 2, the value in the square root term will be negative so the square root is undefined (imaginary) and so is y.  For all other values of x, the value of y will never be above 2.
answered Mar 2 by anonymous

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