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PS: simple equation

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stolyar
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PS: simple equation [#permalink] New post   02 Jul 2004, 01:01
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||Z|–2|=1



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Re: PS: simple equation [#permalink] New post   02 Jul 2004, 02:26
do you have a solution or guess them?
remember that modul equtions sometimes have more roots than they seem to have, other times less.
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Re: PS: simple equation [#permalink] New post   02 Jul 2004, 04:52
stolyar wrote:
do you have a solution or guess them?
remember that modul equtions sometimes have more roots than they seem to have, other times less.


Do you mean by this that there are more or less than 4 roots or you are just trying to encourage us to solve instead of guessing. :wink:
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Re: PS: simple equation [#permalink] New post   02 Jul 2004, 04:55
adnis wrote:
stolyar wrote:
do you have a solution or guess them?
remember that modul equtions sometimes have more roots than they seem to have, other times less.


Do you mean by this that there are more or less than 4 roots or you are just trying to encourage us to solve instead of guessing. :wink:


Your answers are correct; however, guessing can be dangerous while dealing with absolute values.
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Re: PS: simple equation [#permalink] New post   02 Jul 2004, 05:03
stolyar wrote:
adnis wrote:
stolyar wrote:
do you have a solution or guess them?
remember that modul equtions sometimes have more roots than they seem to have, other times less.


Do you mean by this that there are more or less than 4 roots or you are just trying to encourage us to solve instead of guessing. :wink:


Your answers are correct; however, guessing can be dangerous while dealing with absolute values.


I actually solved it, though i solve in mind and than get an answer.
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Re: PS: simple equation [#permalink] New post   29 Dec 2006, 02:04
||Z|–2|= 1

We obtain 2 equations:
> |Z|–2 = 1
or
> -(|Z|–2)= 1

Thus,
> |Z| = 3
or
> |Z| = 1

Finally, we obtain the 4 solutions for z : {-3, -1, 1, 3}



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Re: PS: simple equation [#permalink]
29 Dec 2006, 02:04
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