Hello Everyone, Please help me h
3

Question

Hello Everyone, Please help me h

c8829 (Mechanical)

(OP)

2 Aug 16 03:47

Hello Everyone,

Please help me how can i get the value of "D" the equation is like 26=(4500+D^3)/ 45+3*(D^2 - 23). i am using Mathcad 15.0.
Thanks.

IRstuff (Aerospace) · Answer 1 · 2016-08-02 13:19:40

Is this for school? Student posting is not allowed?

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c8829 (Mechanical) · Answer 2 · 2016-08-02 15:35:43

It's not for school... I am still learning mathcad that's the reason.ni tried but don't know what to use exactly..

monkeydog (Aerospace) · Answer 3 · 2016-08-02 16:10:32

Set your equation to 0 (zero) then use Root Finder Function
See the Help menu for instructions on using Root Finder.

IRstuff (Aerospace) · Answer 4 · 2016-08-02 16:21:12

sorry, should have looked at your profile first.

There are at least three ways to get answers in Mathcad:
> Numerical processor using the Given/Find or Given/Minerr, or Root Finder
> Symbolic processor can solve algebraic problems symbolically, on occasion
> Symbolic processor can also find roots numerically

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I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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Occupant (Mechanical) · Answer 5 · 2016-08-02 18:43:28

E.g. see the attached - the second part is only to show it is the correct solution.

http://files.engineering.com/getfile.aspx?folder=f3646cdd-543e-4076-8861-52

c8829 (Mechanical) · Answer 6 · 2016-08-03 06:31:07

Hello Everyone
Thank you Occupant,IRstuff,Monkeydog for your help.

As in the given solution by Occupant do i have to manually select the value of "D" or i can make it automatic?

Thanks for your help.

IRstuff (Aerospace) · Answer 7 · 2016-08-03 13:16:04

I have to hit the road, but the answer is yes, you can make it automatic.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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IRstuff (Aerospace) · Answer 8 · 2016-08-03 14:23:20

Also attached is the sheet itself. I wasn't sure that first set of brackets are actually necessary, so I included them. I upped the precision on the symbolic solver's solution so that the answers from the symbolic and numerical solvers came out the same. Note that the Given/Find requires a guess value for D, which was already calculated by the symbolic solver, but typically, anything close to the actual answer will work, and sometimes, even a guess that's far away will work as well.

http://files.engineering.com/getfile.aspx?folder=2...

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers

c8829 (Mechanical) · Answer 9 · 2016-08-03 16:02:54

IRstuff thanks a lot. Yes, you can do absolutely anything and you are the expert..

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