Solved: Simplifying.

lvl107 · ‎Mar 12, 2013

Hello, Everyone.

Simplify A ?

Thanks in advance for your time and help.

Best Regards.

Werner_E · ‎Mar 13, 2013

Even simpler like this. While I think that Mathcad should be able to simplify it in exact mode.

Notice that I formatted the expession using the Result Format menu, otherwise the 120 would show as 199.9999999....

See below how to prove with Mathcad in exact mode that the coefficients 60 and -120 are exact.

Mathcad is able to do it in exact mode, all it needs is a ridiculous simple help (it should not be necessary):

BTW, don't bother with Valery's file - it's in Prime format and he is just joking around - thats the whole content:

View solution in original post

ValeryOchkov · ‎Mar 13, 2013

Help me please with simplifying too - see the attach!

ViktorKorobov · ‎Mar 13, 2013

Viktor

lvl107 · ‎Mar 13, 2013

Many thanks for your response, Viktor and Valery.

Valery, my Mathcad 14 can not open your file.

Viktor, give me a time.

Best Regards.

Loi.

Werner_E · ‎Mar 13, 2013

Even simpler like this. While I think that Mathcad should be able to simplify it in exact mode.

Notice that I formatted the expession using the Result Format menu, otherwise the 120 would show as 199.9999999....

See below how to prove with Mathcad in exact mode that the coefficients 60 and -120 are exact.

Mathcad is able to do it in exact mode, all it needs is a ridiculous simple help (it should not be necessary):

BTW, don't bother with Valery's file - it's in Prime format and he is just joking around - thats the whole content:

ValeryOchkov · ‎Mar 13, 2013

Werner Exinger wrote:
BTW, don't bother with Valery's file - it's in Prime format and he is just joking around - thats the whole content:

Sorry - It is not a joke More correct

Werner_E · ‎Mar 13, 2013

So you mean your life can't be simplified/facilitated any further (at least not by Mathcad).

On the other hand, we don't see what "Facilitate" evaluates to, so maybe that Prime 3 feature would change our lifes

ValeryOchkov · ‎Mar 13, 2013

Werner Exinger wrote:
...maybe that Prime 3 feature would change our lifes

I have done it in Mathcad Prime 3

Werner_E · ‎Mar 13, 2013

I have done it in Mathcad Prime 3

I would have bet, you did.

Its alarming that your life facilitates to a question mark, though. 😉

lvl107 · ‎Mar 13, 2013

Many thanks, Werner. I got it.

Best Regards.

Werner_E · ‎Mar 14, 2013

Loi Le wrote:
Many thanks, Werner. I got it.
Best Regards.

Yes, but you used float throughout and therefore you can not rely absolutely on the values returned. Even as you used symbolics results must not be 100% exact that way.

That was the reason I tried (and succeeded) to get the symbolics to come to reasonable result without using float. Its ridiculous that simply adding ar subtracting those specific values do the job.

Thanks to Viktor for pointing me in the right direction with his idea of using float. I don't think I would have come up with this (rather would have tried some kinds of substitutions combined with the use of assume).

Werner

lvl107 · ‎Mar 14, 2013

Hello, Everyone again.

Best Regards.

Werner_E · ‎Mar 14, 2013

Loi Le wrote:
Hello, Everyone again.
Best Regards.

No, as already said, using float means you are leaving the road of exact results. Thats the reason for my efforts to avoid float in symbolics. Nevertheless the first float was necessary to see what the result could be and to suspect that 60, 12 and 120 could be the exact results.

BTW, Mathcad won't factor for non integers anyway.