## vertical asympotote

### In mathematics, a vertical asymptote is a vertical line that a graph approaches but does not intersect as the input approaches a certain value

In mathematics, a vertical asymptote is a vertical line that a graph approaches but does not intersect as the input approaches a certain value. It can occur in the graph of a function when the function value tends towards infinity or negative infinity as the input approaches a specific value.

To understand vertical asymptotes, let’s consider a simple example. Consider the function f(x) = 1/x. As we approach x = 0 from both sides, the function values become increasingly large in magnitude. As x gets closer and closer to 0, f(x) approaches positive infinity when x is positive, and approaches negative infinity when x is negative.

The vertical line x = 0 is a vertical asymptote for the graph of f(x) = 1/x. This means that as we move along the graph of the function to the left or right, the function value continues to increase or decrease without bound.

Vertical asymptotes can also occur at other values. For example, let’s take the function g(x) = (x^2 – 1) / (x – 1). As x approaches 1 from both sides, the function values become arbitrarily large or small. In this case, x = 1 is a vertical asymptote for the graph of g(x).

It is worth noting that not all functions have vertical asymptotes. For example, linear functions like f(x) = 2x + 3 do not have vertical asymptotes since they do not exhibit unbounded behavior as x approaches any specific value.

In summary, a vertical asymptote is a vertical line that a graph approaches but does not intersect as the input approaches a certain value. It indicates the behavior of the function as the input approaches a specific point and can be either positive or negative infinity. Vertical asymptotes are commonly seen in rational functions, such as those with variable expressions in the numerator and denominator.

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