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+--- Thread: I had a thought... (/showthread.php?tid=8448)
I had a thought... - adrina_kellers - 13-10-2005
I had a thought this morning... (Sorry to all you maths haters out there.)
is -1 a prime number. a prime number has got two factors itself and 1. Therefore -1 has 1 and -1. Therefore is -1 a prime number.
I had a thought... - Mirinee - 13-10-2005
Interesting point, but it's not.
A prime number has to be positive, by definition, hence -1 is not a prime number.
If you think that -1 is a negative prime number, then the answer is also "no", because a negative prime number is defined to have 4 different factors: 1, -1, itself and negative itself.
I had a thought... - Shade - 13-10-2005
what... that makes my head hurt...
also... find the square of ANY NEGATIVE number... lol
I had a thought... - adrina_kellers - 13-10-2005
Hmmmm... You've got a point but i thought you had to have a whole number.
I had a thought... - Shade - 13-10-2005
you do... i was just seeing if you knew...
I had a thought... - Mirinee - 13-10-2005
The square of any negative number is a positive number. The negative number needs not be a whole number.
e.g. (-2)^2 = 4 and
(-0.2)^2 = 0.04
The square root of a negative number is imaginary. Remember this, children
.e.g. (-4)^0.5 = 2i
Edit: forgot to add example.
I had a thought... - Shade - 13-10-2005
nope... try and find the root of negative 1... even calculators cant do that cos it goes from infinity to negative infinity...
I had a thought... - Mirinee - 13-10-2005
Hehe, your calculator sucks.
...
I mean...
No, it doesn't go from infinity to negative infinity.
The answer to your question is i.
I had a thought... - TheUnnamedOne - 13-10-2005
I haven't done maths in a while, so i can't really remember much about it, but i'm pretty sure that aint what i is...
I had a thought... - Mirinee - 13-10-2005
*Cries, because nobody believes her*.
Ask a FOmar then. I'm sure he'll tell you it's true. Him with so much MST and all, well, third highest. Whatever ... Now I shall stop spamming and leave this thread.
*Ryuker!*