Suppose that | |

Then is of the form:

The tendency (or limits) of such forms may or may not exist

For example, if and , then that is of the form . But as we have seen earlier, the limit of exists, as

Limits of the form are called indeterminate forms. The limits of such forms may exist but it cannot be determined by simple observation (hence the name indeterminate). Such forms need to be reduced into determinate forms for which the limit can be determined. In the above case, for example, an indeterminate form was reduced into a determinate form , whose limit can be determined by substitution of