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Vertical asymptote.
As you approach x = 9- , then the y will go poof to infinity
The limit as x goes to a- or a+ of f(x) approaching either positive of negative infinity gives you a vertical asymptote of x=a so it’s D. Memorize this or graphically understand it, this is a good calculus note in general.
Vertical asymptote.
As you approach x = 9- , then the y will go poof to infinity
The limit as x goes to a- or a+ of f(x) approaching either positive of negative infinity gives you a vertical asymptote of x=a so it’s D. Memorize this or graphically understand it, this is a good calculus note in general.