# How to calculate the limit of a function in Geogebra

In this lesson I'll explain how to calculate the limit of a function in Geogebra by a practical example.

Write a function. For example f(x)=1/x^{2}

Now type the command **Limit()**.

Write the name of the function in parentheses. In this example, the function is called "f".

Also indicate the limit you want to calculate after a comma. For example, the limit as x tends to 0.

Geogebra calculates and displays the limit of the function as x approaches zero.

In this example the limit of the function when x → 0 is equal to +∞.

You can calculate any limit. Also the limit as x tends to infinity (x → ∞). To make the infinity symbol on Geogebra press ALT + U (on Windows / Linux) or ALT +, (on Mac).

If you want to determine left and right-hand limits, you have to use two other commands.

Use **LimitAbove()** to calculate the right-hand limit

Use **LimitBelow()** to calculate the left-hand limit

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