Sayonara Posted October 17, 2003 Share Posted October 17, 2003 neo_maya said in post #71 :Hey, I think there should be a sqrt sign in the smilies list - don't you think? Use the superscript tags. Link to comment Share on other sites More sharing options...
JaKiri Posted October 17, 2003 Share Posted October 17, 2003 Sayonara³ said in post #76 : Use the superscript tags. I was going to find an image of a square root sign to demonstrate what she meant, but when searching google for square root, the first thing up was This, which is much more appealing as a smiley. Link to comment Share on other sites More sharing options...
neo_maya Posted October 17, 2003 Share Posted October 17, 2003 MrL_JaKiri said in post #75 :Make a new thread I already have. Sayonara is a she !!!!!!!!!!!!!!??????????!!.......... Link to comment Share on other sites More sharing options...
neo_maya Posted October 17, 2003 Share Posted October 17, 2003 No offence. Link to comment Share on other sites More sharing options...
JaKiri Posted October 17, 2003 Share Posted October 17, 2003 My fingers, they type of their own accord. Link to comment Share on other sites More sharing options...
Kedas Posted October 17, 2003 Share Posted October 17, 2003 MrL_JaKiri said in post #63 :No. That's equivilent to saying that -4 = 4, because SQRT(16) = 4 SQRT(16) = -4 Hence -4 = 4. what ?? I start with -1=-1 and end with 1=-1 without making any obvious mathematical error. BTW I know that 1=-1 is wrong but that's the point of the message. with numbers: 2.2=4 sqrt(-4).sqrt(-4)=4 sqrt(-4.-4)=4 sqrt(16)=4 The difference is that no one claims that sqrt(-4)=2 but they do claim sqrt(-1)=i. Link to comment Share on other sites More sharing options...
Tom Mattson Posted November 12, 2003 Share Posted November 12, 2003 YT2095 said in post #56 :and so, if you calculate the sqr rt of -1, what is the answer? The answer is 'i'. in one post you say it`s not a number like "35" and in another you say is IS a number? Kinda WELL LOST here! OK, how about this: 'i' is not an element of Z, as 35 is. 'i' is an element of C, as 35 also is. Link to comment Share on other sites More sharing options...
Tom Mattson Posted November 12, 2003 Share Posted November 12, 2003 Kedas said in post #62 :i^2=-1 not the same as i=sqrt(-1) You're right: i2=-1 contains more information than does i=sqrt(-1). -1 (like all numbers) actually has two square roots: +i and -i. There is a funny 'prove' about it that says that -1=1 i.i=-1 sqrt(-1).sqrt(-1)=-1 sqrt(-1.-1)=-1 sqrt(1)=-1 1=-1 The part in red is where the mistake was made. MrL Jakiri's comment was right. I can do the exact same thing with real numbers. 2*(-2)=-4 sqrt(4)*sqrt(4)=-4 sqrt(16)=-4 4=-4 Ta-Daaaa! Link to comment Share on other sites More sharing options...
Kedas Posted November 12, 2003 Share Posted November 12, 2003 yeah, it's a funny thing to keep people busy I only wanted to point out the difference between the two with some proof. Not to start a debate about the comparison with real numbers. Link to comment Share on other sites More sharing options...
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