exclude non-real solutions, HowTo?

[ptc-763829]

hello everyone,

i'm using prime 2.0

i want to exclude 2 of my 3 solutions which are non-real ...

I'm not really familiar with the Keywords and Modifiers,so i tried the "assume,var=real

which made everything only worse.....

i have searched a lot on google and elsewhere but couldnt find a solution for that problem....

maybe someone here can help...

thx in advance

[ValeryOchkov]

May be this is a help for you:

[AndyWesterman]

To use Valery's example:

Regards

Andy

[ptc-763829]

Hi Valery

your idea seemed really good, but unfortunately i'm using more than one variable and

Mathcad simply tells me that "undefinied"....

@ Westerman:

thx but i already tried that, which made everything only worse.....

[ValeryOchkov]

May be so:

[ptc-763829]

thx

what does "clear_sym(n_ein) " ? does ist unattache the unit?

is it possible to access the real-result, to make further calculations?

[ValeryOchkov]

fronz penner wrote:

thx

what does "clear_sym(n_ein) " ? does ist unattache the unit?

Ignoring the numerical value of the variable in the symbolic transformation. As x:=x in Mathcad 15.

[ValeryOchkov]

fronz penner wrote:

thx

is it possible to access the real-result, to make further calculations?

See please my first message!

[ptc-763829]

i tryed hard...

but i cant see that work...

[ValeryOchkov · Accepted solution]

fronz penner wrote:

i tryed hard...

but i cant see that work...

Variables in your formula (the solution of equation) must have numerical values!

And second.

Please send npt bmp but png or better mcdx files.

[ptc-763829]

sorry i wasnt aware of that.

but THANK you very much

it is working finaly !!!!

[VladimirN]

Hello,

Please attach your worksheet.

[ValeryOchkov]

VladimirN. wrote:

Hello,

Please attach your worksheet.

Who?

Fronz or me or both?

[ValeryOchkov]

Sorry, the symbolic math can not work with units.

[ptc-763829]

there is only one unit in n_nein, which i considerer and tried with an undifinied variable wich hasnt any unit

attached....

but thx for that info!