Prove X-x = 0

  • Thread starter chalky00
  • Start date
  • #26
20
0


i see
 
  • #27
jgens
Gold Member
1,581
50


x=nPi that has a variable though ... x= tsro1 doesnt
If the presence/absence of a variable is throwing you off, that's an easy matter to fix. If [itex]x[/itex] is a number such that [itex]x^2 = 1[/itex] then [itex]x = n(1)[/itex] where [itex]n=1[/itex] or [itex]n=-1[/itex]. This is exactly what everyone else has been saying!
 
  • #28
20
0


Just use 'root'. It has the same number of letters and has the advantage of not having to be explained.
haha true
 
  • #29
20
0


If the presence/absence of a variable is throwing you off, that's an easy matter to fix. If [itex]x[/itex] is a number such that [itex]x^2 = 1[/itex] then [itex]x = n(1)[/itex] where [itex]n=1[/itex] or [itex]n=-1[/itex]. This is exactly what everyone else has been saying!
ok!!
 
  • #31
20
0


ahh but root uses a double o and all the letters are on the same line ... its just more efficient haha
 
  • #32
jgens
Gold Member
1,581
50


It may be more efficient but it's also ambiguous. We could use "root" to represent any nth root whereas "sqrt" specifically denotes the squareroot.
 
  • #33
20
0


also true
 
  • #34
20
0


so (sqrt 1 - sqrt 1) is different to
x=sqrt 1
x-x
 
  • #35
DaveC426913
Gold Member
18,976
2,468


so (sqrt 1 - sqrt 1) is different to
x=sqrt 1
x-x
(sqrt 1 - sqrt 1) has 4 possible solutions.
 
  • #36
jgens
Gold Member
1,581
50


so (sqrt 1 - sqrt 1) is different to
x=sqrt 1
x-x
No! Hopefully without confusing you too much, if we let [itex]x = \sqrt{1}[/itex] then [itex]x=1[/itex] because the [itex]\sqrt[/itex] operation retrieves the principal (positive) square root. However, if [itex]x[/itex] is a number such that [itex]x^2 = 1[/itex] then [itex]x=1[/itex] or [itex]x=-1[/itex]. Now, using this second definition of [itex]x[/itex], once we choose a value for [itex]x[/itex] we need to stick with it. We can't have [itex]x = 1[/itex] and [itex]x = -1[/itex] at the same time because this would violate the law of non-contradiction and you're already assuming that [itex]1 = -1[/itex].
 
  • #37
186
0


Stop feeding the troll (OP)!
 

Related Threads on Prove X-x = 0

Replies
11
Views
22K
Replies
10
Views
1K
  • Last Post
Replies
12
Views
986
  • Last Post
Replies
19
Views
1K
Replies
42
Views
5K
  • Last Post
Replies
15
Views
5K
Replies
7
Views
1K
  • Last Post
Replies
2
Views
1K
Replies
3
Views
2K
Top