Question

this

Answer 1

link

Answer 2

real number could be anything, it doesn't have to be positive or a whole number, it is even irrational.
I would say that C is the only one that does not fir, b/c it is square root of -1 and therefore an imaginary number...

Answer 3

This is a bad question.

Answer 4

why is tht

Answer 5

Do you know what real number is?

Answer 6

5

Answer 7

It's defined at x = 4. It's defined as \(i\).
I doubt if this is what they meant to ask.

Answer 8

@Starr_Dynasty, if you know what a real number is, you can plug the choices into your equation you will see that C is equal to a square root of a negative number and C is the only not real number, otu of the choices you have!

Answer 9

They meant to ask if it was real, not defined. Hence, bad question.

Solomon's thinking is right if they had asked properly, though.

Answer 10

@Starr_Dynasty, if that is from your book it should be crossed out and never aksed again.

Haven't seen such a bad question!!!!!!!!

Answer 11

Or, they could have specified \(f(x)\) had to be a real number, but they didn't, they just said \(x\) is real.

Answer 12

This image will give you a good idea of what a real number is @Starr_Dynasty,

https://www.google.com/search?q=real+number&source=lnms&tbm=isch&sa=X&ei=Vp9pUqfeIoTK9QSnuID4Bg&ved=0CAkQ_AUoAQ&biw=1920&bih=955#facrc=_&imgdii=_&imgrc=2E3Xm11PasI5WM%3A%3BS24H-C_xfjYcUM%3Bhttp%253A%252F%252Fscimathmn.org%252Fstemtc%252Fsites%252Fdefault%252Ffiles%252Fimages%252Fframeworks%252Fmath%252F8.1.1A%252Fimage131.jpg%3Bhttp%253A%252F%252Fscimathmn.org%252Fstemtc%252Fframeworks%252F811a-rational-irrational-real-numbers%3B866%3B386

Answer 13

Anyway, this question is incoherent so I'll just give you the answer they're probably expecting, which is B.

Answer 14

tht was so so so so confusing

Answer 15

It's a bad question.

Answer 16

its a terrible one yet u managed to get it right

Answer 17

What they are trying to teach you is that the square roots of negative numbers are not real numbers.

Answer 18

I got it right by knowing what they were trying to teach you and assuming they asked that, instead of what they actually asked. :)

Answer 19

wow lol

Answer 20

Anyway, just file that one away and remember it.

The square root of a number less than 0 is not a real number.

Answer 21

thts cool

Answer 22

(Because there is, after all, no real number you can multiply by itself to get a negative)