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J
jrodriguez-98-Gravel
8-Gravel
September 29, 2016
Question

How to find a value by iteration

  • September 29, 2016
  • 15 replies
  • 6199 views


I come across these type of equations all the times where I have to find a variable displayed on both sides of an equation and if derived can lead to a quadratic or cubic.

However I would like to know if there is any way without deriving the equation, to find the value for me? I try to do this but it does not work. see image below.

I also would like to Know if Mathcad does algebraic operations and can cancel out variables or convert complex equations into their simplest forms?

Thanks

15 replies

J
jrodriguez-98-GravelAuthor
8-Gravel
September 29, 2016

Q1.png

M
MJG1-Visitor
1-Visitor
September 29, 2016

In the "guess value" section you need to define kd with the "definition" equals sign (:).

In the "constraints" section, you need to define your constraint with the Boolean "equal to" sign (ctrl+=)

Your equation is not unit consistent.  On the right side, you are trying to subtract a distance from an area (in^2 - in).  Perhaps the last bit is supposed to be d*kd?

You screenshot didn't show your value for b, so I assumed 1:

J
jrodriguez-98-GravelAuthor
8-Gravel
September 29, 2016

Thank you for your reply. the equation is suppose to derive into a quadratic and then solve the variable. I wanted to know if there is a possibility to solve it without having to derive it or if Mathcad can derive it into a simplest form, how?

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