Seed values Solving non linear equations

[Aries]

(09-19-2018 03:04 AM)John9 Wrote:  Hello

I always struggle to solve non linear equations on my HP Prime when I need to enter Seed values.

For example I am trying to solve the equations I=0.02898*D^4 and 52000 = (106.4*(D/2))/I

Now I cannot find a solution with the solve App unless I enter a Seed value for I and D that very close to the Solutions. Solving the two equations on Wolfram alpha works fine and... I=0.000335618 D=0.328047.

Is there a way to solve non linear equations using the HP prime. I know I can just simplify it down to one equation and use the solve function but i would like to know how to solve non linear systems without having to use a seed value that is extremely close to the actual solution.

I guess you have to use the numeric solver (fsolve).
On the Prime you have separate symbolic and numeric solver (solve and fsolve, respectively), unlike the Nspire.
Best,

Aries