# How To Find The Domain of a Function – Radicals, Fractions & Square Roots – Interval Notation

This algebra video tutorial explains how to find the domain of a function that contains radicals, fractions, and square roots in the denominator using interval notation. This video contains plenty of examples and practice problems and is useful for students in algebra and precalculus.

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1. Brian Sinzumwa on March 12, 2021 at 12:54 am

Very helpful, thank you very much.

2. Sai Jeevan on March 12, 2021 at 12:58 am

Yeah

3. TOP MAN on March 12, 2021 at 12:58 am

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4. The grubhub guy on March 12, 2021 at 12:59 am

Yo thanks bro, I got a pre-calc test tomorrow and this really helps. Cheers

5. Nodira Rahmonqulova on March 12, 2021 at 1:00 am

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6. Nicole jaja on March 12, 2021 at 1:01 am

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7. denkiyy on March 12, 2021 at 1:02 am

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8. Adnan Faisal on March 12, 2021 at 1:03 am

9. ThatoPearl on March 12, 2021 at 1:04 am

i have trouble with finding the domain of a radical logarithm function. Please make a video about it if you can.

10. Queen of Dark on March 12, 2021 at 1:05 am

If you have trouble understanding, try and watch this video more than once and the more you watch the more you’ll understand.

11. Ihsan DEEK on March 12, 2021 at 1:07 am

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14. Yashvardhan Singh Rathore on March 12, 2021 at 1:09 am

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15. I'm not alone on March 12, 2021 at 1:12 am

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16. May Men on March 12, 2021 at 1:13 am

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17. Canadian Tiger on March 12, 2021 at 1:16 am

Why the inequality did not equal to 0 at 11:03?. How does the square root make a difference? @The Organic Chemistry Tutor

18. Anthony Savonin on March 12, 2021 at 1:16 am

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20. Furbs on March 12, 2021 at 1:18 am

Thank you but need to slow down.

21. atta blessing on March 12, 2021 at 1:23 am

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22. F&B House on March 12, 2021 at 1:25 am

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23. FaInTastik on March 12, 2021 at 1:25 am

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24. Assassins Addict on March 12, 2021 at 1:25 am

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25. Sarah Bogovich on March 12, 2021 at 1:26 am

@The Organic Chemistry Tutor
What is the denominator for example is 2b^2 + 11b – 6 = 0.
I tried doing it the way you said but the function didn’t work with factoring out the problem because (6×1) = 6 but doesn’t add up to 11 and (3×2) = 6 but that does add up to 11 either even if you try to put as a negative. So what do you do to solve that function?

26. Sai Jeevan on March 12, 2021 at 1:27 am

Hmm

27. Navya Kapoor on March 12, 2021 at 1:28 am

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31. Alessandro Pierre on March 12, 2021 at 1:32 am

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32. Maximilian Reichert on March 12, 2021 at 1:34 am

There is a mistake, for the last function the domain should be (-4,-3] united with (4,infinity)

33. maria landivar on March 12, 2021 at 1:35 am

I’m a little confused at 5:56. How is it all real numbers? hmmmmmm………

34. yevsel on March 12, 2021 at 1:35 am

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35. Matheus H. on March 12, 2021 at 1:36 am

What if in that first expression "x" = 7/2?

36. Md Nayem Uddin on March 12, 2021 at 1:36 am

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37. Czaria Salazar on March 12, 2021 at 1:37 am

Continuity on an interval next time please..☹️

38. arockyroad on March 12, 2021 at 1:39 am

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39. Eleno Sigarroa Silva on March 12, 2021 at 1:40 am

I got a math problem i am stuck on. F(x)=7+ square root of a+8. Any recommendations?

40. Gretchen Burgess on March 12, 2021 at 1:40 am

thank you so so so much this is the only video that helped!!!

41. Jennia Gibbs on March 12, 2021 at 1:42 am

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42. Nimthera on March 12, 2021 at 1:43 am

This video helped me a lot. Thank you so much!!!!

43. Sai Jeevan on March 12, 2021 at 1:44 am

Hey

44. ARK Gamming on March 12, 2021 at 1:44 am

Thank u sir for ur great explaination..!!!

45. Durshi Ayodya on March 12, 2021 at 1:45 am

Here’s a summary of the restrictions which seperate:
Restrictions In Domain:
• Log (x + 1) > Has to be positive (greater than 0)

• Square roots ( x > 0) Has to be positive

• Denominators: 1/x ( x cannot equal zero)

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47. aliya on March 12, 2021 at 1:49 am

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48. Cringy Ninja on March 12, 2021 at 1:52 am

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49. enamul faisal on March 12, 2021 at 1:52 am

God bless u brother, tomorrow I have a class test and I was having a problem finding a domain but this video has helped me a lot .Tomorrow, I would score some good marks

50. ibrahim Alharbi on March 12, 2021 at 1:53 am

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