Definition: an Asymptote of a curve is straight, which indefinitely approaches the curve when removing ii nesconset.
Vertical asymptotes 
is a vertical asymptote
at
Vertical asymptote can be in point
if the point
limit open intervals scope of this function and point
function tends to infinity.
Examples of vertical asymptotes
When
When
— vertical asymptote

When
— vertical asymptote

When
When
— vertical asymptote

Inclined and horizontal asymptotes 
- If
is a rational function where the degree of the numerator one more than degree of denominator, then allocated the integer part and use the definition of asymptote.
- In the General case, the equation of the oblique and horizontal asymptotes
can be obtained using formulas