Hi all

was doing a function sketching practice problem and was wondering;

for examples sake lets use:

y = x^3/(9-x^2)

so the domain restrictions on this one would be -3 and 3. Is there ever a case where a domain restriction does not result in a vertical asymptote?

Is it necessary to evaluate the L.H.L. and R.H.L. to verify that the function goes to +- infinity? or is it just implied?

just curious, thanks in advance!

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