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## Homework Statement

Find the Vertical and horizontal asymptotes of this function

f(x)=(4x^2+25)/(x^2+9)

## The Attempt at a Solution

I think that the horizontal asym. is y=4

But the Vertical if (x^2+9)=0 then x is an imaginary number. So is the asym. (3i) or does the asym not exist?