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please find the limit of function given in image (question is in iimage)

ANKIT , 8 Years ago
Grade 12th pass
anser 1 Answers
Askiitians Tutor Team

To find the limit of a function, we typically analyze the behavior of the function as it approaches a certain point. Since I can't see the image you mentioned, I’ll guide you through the general steps you can take to find limits, which you can apply to your specific function.

Understanding Limits

Limits help us understand the value that a function approaches as the input approaches a certain value. This is crucial in calculus, especially when dealing with functions that may not be defined at certain points or exhibit indeterminate forms.

Steps to Find Limits

  • Direct Substitution: Start by substituting the value into the function. If you get a finite number, that’s your limit.
  • Factoring: If direct substitution results in an indeterminate form like 0/0, try factoring the expression to simplify it.
  • Rationalizing: For functions involving square roots, rationalizing the numerator or denominator can help eliminate indeterminate forms.
  • L'Hôpital's Rule: If you still encounter an indeterminate form after simplification, consider using L'Hôpital's Rule, which involves taking the derivative of the numerator and denominator.
  • Graphical Approach: Sometimes, sketching the graph of the function can provide insight into the limit as it shows the behavior near the point of interest.

Example of Finding a Limit

Let’s say we want to find the limit of the function f(x) = (x² - 1)/(x - 1) as x approaches 1. Here’s how we can approach it:

  1. First, substitute x = 1 into the function: f(1) = (1² - 1)/(1 - 1) = 0/0, which is indeterminate.
  2. Next, factor the numerator: x² - 1 = (x - 1)(x + 1). So, we rewrite the function as f(x) = [(x - 1)(x + 1)]/(x - 1).
  3. Now, we can cancel the (x - 1) terms (as long as x ≠ 1): f(x) = x + 1.
  4. Finally, substitute x = 1 again: f(1) = 1 + 1 = 2. Thus, the limit as x approaches 1 is 2.

Final Thoughts

Finding limits can sometimes be straightforward, but other times it requires a bit of manipulation. Always start with direct substitution and then apply other techniques as needed. If you have a specific function from your image, feel free to share the details, and I can help you work through it step by step!

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