UoPeople brought me here, thank you for sharing this video and allowing others to learn from you. You are teaching in a university course here, kudos professor =]
When you close your parentheses do you switch from square bracket to normal ones or is that how it should be written the right way mathematically? E.g. (-1, 4] instead of (-1, 4)
The brackets / parentheses show whether you include the number itself in the domain. Use a bracket if the number is included, and parentheses if it isn't included. I know this was asked 7 months ago, but I want to answer for any future viewers.
I need help, I don't understand why y is greater than or equal to zero on the second example. Why can't we say y +3 is greater than or equal to zero, like we did for x?
i'm assuming that you are referring to x+3. well the reason is because if you put any number smaller than 3, it will square root a negative number, which will be undefined, so you need to have numbers greater than or equal to 3 in order to make the function works. i hope u understand
@@harryhwang9353 No, like the question was how we got y greater than or equal to 0 instead of y greater than or equal to -3 like in the first example where y was greater than or equal to 0 same as the domain x greater than or equal to 0.
UoPeople brought me here, thank you for sharing this video and allowing others to learn from you. You are teaching in a university course here, kudos professor =]
@ 4:40"how did u know the range just by equating to 0 then subtracting it with 4.?
When you close your parentheses do you switch from square bracket to normal ones or is that how it should be written the right way mathematically? E.g. (-1, 4] instead of (-1, 4)
The brackets / parentheses show whether you include the number itself in the domain. Use a bracket if the number is included, and parentheses if it isn't included.
I know this was asked 7 months ago, but I want to answer for any future viewers.
@@hyperjohn6627 And yes
I need help, I don't understand why y is greater than or equal to zero on the second example. Why can't we say y +3 is greater than or equal to zero, like we did for x?
i'm assuming that you are referring to x+3. well the reason is because if you put any number smaller than 3, it will square root a negative number, which will be undefined, so you need to have numbers greater than or equal to 3 in order to make the function works. i hope u understand
@@harryhwang9353 No, like the question was how we got y greater than or equal to 0 instead of y greater than or equal to -3 like in the first example where y was greater than or equal to 0 same as the domain x greater than or equal to 0.
So the range of any square root function is y>=0?? sample sqrt(1+x^2) range is [0,&)??? Or not?
unless theres a number outside to square root function like the third example he showed. (sorry this was 6 years late)
@@ishwarya3150so for third example , it can be y
Great video, I subscribed 0:48 seconds in
Thank you.
what is you have a square root over x-3?
This should help. th-cam.com/video/lj_JB8sfyIM/w-d-xo.html
@@Mathispower4u that's crazy🤣
it makes me understand fully
You're awesome, thanks.
Thanks. I think I finally understand
thank you.
Thanks
bigg like & thank's
MATH IS DISGUSTING SOMETIMES. THANKS FOR THE VIDEO THO.