limit of 0/0
When we encounter a limit of the form 0/0, it is called an indeterminate form
When we encounter a limit of the form 0/0, it is called an indeterminate form. This means that we cannot immediately determine the value of the limit just by looking at the expression.
To evaluate the limit of 0/0, we need to apply algebraic manipulations or use other strategies such as factoring, rationalizing the numerator or denominator, or applying L’Hôpital’s rule.
Let’s consider an example:
lim(x -> 2) (x^2 – 4)/(x – 2)
If we substitute x = 2 directly into the expression, we get 0/0, which is an indeterminate form. To further examine this limit, we can use factoring as a method of simplifying the expression.
(x^2 – 4)/(x – 2) can be factored as [(x + 2)(x – 2)]/(x – 2)
Now, we can cancel out the (x – 2) terms:
(x + 2)
Finally, substitute x = 2 into the simplified expression:
lim(x -> 2) (x + 2) = 4
Therefore, the limit of 0/0, in this case, is 4.
It is important to note that approaching a limit of 0/0 does not always yield a finite value. In some cases, it may result in infinity or be undefined. Thus, it is crucial to evaluate these indeterminate forms carefully and consider additional techniques when necessary.
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