(02-18-2015, 02:01 AM)Derkylos Wrote: Root((-1)^2)=1, Root(-1^2)=i. Order of functions.
Also, n+1
(02-18-2015, 02:48 AM)Black Widow Wrote: actually your wrong: i = Root (-1), Root(-1^2) = Root ( -1 x -1) = Root ( 1 ) = +/-1
lol.
Root[-1]= +-i
But nevermind that.
You got it right Error. It's a problem about definitions.
1= (+-1)^2:
a) (1)^2= Root[(1)^2]= 1.
b) (-1)^2= |Root[(-1)^2]|= 1.
Because (-1)^2 is always a positive number. Positive numbers always return positive roots (in the case of real numbers) and thus absolute value is applied to the result.
(06-19-2016, 12:06 PM)Mao Wrote: inb4 Sirius gets renamed to XTF.