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Mathematics 20 Online
OpenStudy (dannyrod2000):

http://prntscr.com/4cn9fd

OpenStudy (joannablackwelder):

One way the function is undefined is dividing by 0. Is there a value of x you can plug in that the denominator will be zero?

OpenStudy (dannyrod2000):

it is asking for defined :)

OpenStudy (joannablackwelder):

Right, but if we can find where it is undefined, we can narrow down what is defined.

OpenStudy (dannyrod2000):

ohhh

OpenStudy (joannablackwelder):

Or you could find it more directly by plugging in numbers. But that would be a longer method. :)

OpenStudy (usukidoll):

wouldn't the problem be undefined if x = 1?

OpenStudy (dannyrod2000):

i was thinking about that :)

OpenStudy (usukidoll):

|dw:1407996478510:dw|

OpenStudy (usukidoll):

If x = 1, then we will have the square root of 0 which is 0 boom ... undefined right there.

OpenStudy (joannablackwelder):

Yes, that was the value I was trying to encourage @dannyrod2000 to get...

OpenStudy (dannyrod2000):

so it can't be A and B?

OpenStudy (joannablackwelder):

Why not A?

OpenStudy (dannyrod2000):

i mean B and D

OpenStudy (usukidoll):

some of the answer choices are written weird... as in not in standard form.

OpenStudy (dannyrod2000):

its APEX :)

OpenStudy (joannablackwelder):

Good!

OpenStudy (joannablackwelder):

The other criteria that makes a function undefined is to have a negative under an even radical.

OpenStudy (dannyrod2000):

so it can't be B

OpenStudy (joannablackwelder):

RIght.

OpenStudy (dannyrod2000):

xD

OpenStudy (joannablackwelder):

:D

OpenStudy (dannyrod2000):

i good at this

OpenStudy (joannablackwelder):

You're getting there!

OpenStudy (dannyrod2000):

so itss A!!!!!!

OpenStudy (joannablackwelder):

You got it!!!!

OpenStudy (dannyrod2000):

xD yay

OpenStudy (anonymous):

It's asking where it's defined @UsukiDoll

OpenStudy (joannablackwelder):

Great job! :)

OpenStudy (dannyrod2000):

\[\bigstar I~AM~BATMAN \bigstar\]

OpenStudy (dannyrod2000):

xD jk @iambatman is BATMAN

OpenStudy (dannyrod2000):

actually DARK NIGHT

OpenStudy (usukidoll):

@iambatman quoting someone from earlier 74 JoannaBlackwelder Human Calculator Medals 3 Right, but if we can find where it is undefined, we can narrow down what is defined.

OpenStudy (dannyrod2000):

well i have more questions!

OpenStudy (dannyrod2000):

thanks @UsukiDoll

OpenStudy (usukidoll):

I neeed to eat. Can't solve without food

OpenStudy (anonymous):

Yes I know that, I meant maybe that's why you thought it was written weirdly :P

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