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i don’t entirely get this????….. at all! plzz explain.
http://xkcd.com/849/
That didn’t help at all.
sure
in math i is a imaginaire number but i^2 equals -1 a ‘real’ number
i is invented to solve this
x^2=-1
so that
x^2= i^2
x= i or x= -i
i hope i helped you
Or, a Rasta explanation:
i^2 = ii
or I and I… as in, I and I keeping it real, mon…
Yeah, it works… don’t look at me like that…
Yeah… doesn’t work at all!! :/
i = Square root of -1. You can’t do that and thus called an imaginary number. If you square it, multiply it by itself, it becomes -1 and is a real number.
No.
i is the square root of -1. that means that i squared equals -1. and like someone down there says: i^4 > 0 (i^4 = r(-1)^4 = (-1^(1/2))^4 = -1^2 = 1)
in simple words: i^2 = -1
i^4
Stayin’ Positive.
That’s more of a win.
Excellent!
Umm that means Iodine or Internet 2 or -1?? Someone please explain.Apparently I am not that cool…
It’s in reference to an imaginary number. i represents the square root of -1. If you square it, it becomes 1 which is a real number.
Actually, if you square i, you get -1. Since i is the square root of -1. If you take it to the power of 4, you do get 1.
I was thinking of how to prove it wrong until I realized it’s entirely right.
Hahaha my av is a Medusa doing the Walk Like an Egyptian
-1^2 = negative and -1^4 = positive? seriously? XD
thanks!!! Its been 10 years since I was in quantitative methods and I NEVER use any real math in my life or job anymore!!
i is an imaginary number used to substitute -1 under a radical (since you can’t take the square root, or any even root, of a negative number). squaring i removes the negative making it a real number again.
You can take a root of a negative number and still have a real number. Cube root of (-8)= (-2)(-2)(-2).
Mrs. Buzzkill: “[...] you can’t take the square root, ***or any even root*** [...]“
he said EVEN root. you fail
She*
Read more carefully. “Any even root”, for which cube root doesn’t qualify.
I could be wrong but I don’t think squaring i removes the negative:
i = √(-1)
i² = √(-1) · √(-1) = -1
No, but it removes the “imaginary”, making it “real”
You can’t get a negative number if you ^2.
Captain obvious did his work.
Unless the number you WERE talking about is the square root of a negative number. U mad?
negative numbers don’t have a square root. not really mad.
You can put them in a square root. The result just becomes imaginary. Problem?
it doesn’t remove the negative. but since square roots of negative numbers can not be explained using real numbers only, they made the sqare root of -1 equal to i.
you can take the cube root of a negative number. (-3)^3 = -27, so the cube root of -27 is not impossible – the square root is, though – since that’d make -3. clear?
Out of curiosity. Do you not learn complex numbers in high school math in your country/state whatever?
Here in germany you don’t learn it in the highest of all school forms. Only if you choose maths as your main subject or if you’re interested enough.
that’s not true, i learned it in 10th grade. that just confirms, that the german degrees are incomparable
I’m liking germany, now.
WA ST, U.S. – We learn it in freshblood year.
You probably just didn’t pay attention for some months.
bulls**t! you probably visited a waldorf-school (for non-germans: thats there where you can learn to dance your name)
Stop being an asshat. Maybe they just don’t have an aptitude for numbers.
He could also be below high school age.
I have a vague recollection of what has been explained, so I’m guessing I learned it at some point, but I haven’t had to use algebra since high school so I’ve forgotten a lot of it.
Ever heard of dyscalculia?
Aha nice
i is an imaginary number. The name says it all : it just doesn’t exist.
wow thnx! imma call u steve kk?
i is the imaginary unit.
i^2=-1 and therefore a real number.
Hmm, i is imaginary but i squared (= -1) is real.
You both fail.
i is an imaginary number – it’s the square root of -1. So i squared is -1, which is a real number. Hence the caption.
Ah, but i is necessary for engineering. I don’t know how, and I don’t know why, but somehow it is.
This is freaking awesome.
I wanna go up to this guy and ask him “Why so negative?”
I thought it was a girl…? Dunno.
Its a girl!! But good one!
I want that hoodie.
Is this from ThinkGeek or something?
i am JUST far enough into algebra 2 to get this joke!
But the shirt is so negative.
My HS math team had shirts with that slogan. Ah, I miss math puns so much.
-1 is also considered everything in comp sci
No. It’s not. -1 is the result of a buffer overflow, and generally considered a massive screw up by the programmer.
-1 internets.
NUI Galway Maths Society hoody
Is this from Ireland, by any chance? That bus looks like a Bus Eireann one, and the hoody looks like ones from UCC…Maths Soc?
Its the NUIGalway Maths Studies Hoodie
if i=-1^(1/2), i^2=-1, i^3=-1*-1^(1/2), and i^4=1, then what does e^((pi)i)+1 equal?
0, but how is that a logical jump?
sorry, it wasn’t. but here’s a good math joke–
there are ten types of people in the world- those who understand binary, and those who don’t!!!
hahahaha (laugh with me) hahahaheeheehoho.
although you might not get it if you don’t understand binary
p.s.- 128+4=132/10000100 (hold it up on your fingers (one being up, zero being down))
i=sqrt(-1) is wrong, as every square root has 2 solutions.
One possible definition of i would be i^2 = -1 (which is not equivalent to i=sqrt(-1))
Anyway, octave tells me the exp(pi*i)+1 = 0…
Square root only has two solutions when taken over the reals.
i = sqrt(-1) is correct by definition, as that is how i is defined. i belongs to C, which is not an ordered field. As such, it is perfectly fine to have only one solution.
ha! you just got pwnd by math! Although it could happen to me all the time… after all, I am only in Algebra 2 honours (note how I spelled honors w/ a “u”– yeah, that’s right. I’m just that awesome (I’m not from the UK, if you didn’t get that already (also, i’m a big fan of parenthesis))).
Looks like a Bus Éireann (Irish Bus) coach, so the hoodie is probably from one of the social groups in the various Universities (further supported by the fact that students are one of the main demographics using public transport in Ireland). There’s a Uni aeronautical society has the slogan “We get high” on their hoodies.
I just saw a girl wearing a blue jumper with
e^i pi + 1 = 0
Where did all the rock jumpers go? ._.
lol that’s clever! i wish i had something like that too..
It’s cool to be smark enouth to understand this
!
I can’t believe you guys! This is very basic math and you don’t f*cking know what ‘i’ stands for? What has happened to American education? WE USED TO GO TO THE MOON!!!!!
Well it is an Irish hoodie!
Just wondering who exactly was taking sneaky pictures of me?? :O
this is what I’d tell my very geeky girlfriend:
9x+7i^3>3(3x-7u)