[Free42] root finder
06-15-2016, 01:31 AM
Post: #2
 Gerson W. Barbosa Senior Member Posts: 1,334 Joined: Dec 2013
RE: [Free42] root solving
(06-15-2016 12:23 AM)Marcio Wrote:  On page 184 of the 15C's user guide, one can find the following equation:
$h = 5000\left(1-e^{-t/20}\right)-200t$
which is solved for t when h=0.

That's a job for WP 34S and its buit-in Lambert W function:

5 ENTER 4 +/- / f e^x RCL* L Wp 20 * 25 + --> 9.284255087576332994076124612599270

Not the answer to your question, sorry, but at least 34 digits for you to check upon the Free42 result :-)
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 Messages In This Thread [Free42] root finder - Marcio - 06-15-2016, 12:23 AM RE: [Free42] root solving - Gerson W. Barbosa - 06-15-2016 01:31 AM RE: [Free42] root finder - Dieter - 06-15-2016, 10:09 PM RE: [Free42] root solving - Dieter - 06-15-2016, 01:03 PM RE: [Free42] root solving - Marcio - 06-15-2016, 01:39 PM RE: [Free42] root solving - Dieter - 06-15-2016, 07:18 PM RE: [Free42] root finder - Marcio - 06-15-2016, 09:12 PM RE: [Free42] root finder - Dieter - 06-15-2016, 10:04 PM RE: [Free42] root finder - Marcio - 06-16-2016, 03:04 PM RE: [Free42] root finder - Dieter - 06-16-2016, 05:14 PM RE: [Free42] root finder - Marcio - 06-16-2016, 06:41 PM RE: [Free42] root finder - Thomas Okken - 06-19-2016, 11:18 PM

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