WP 34S solve an integral
04-24-2015, 12:34 PM
Post: #15
 Dieter Senior Member Posts: 2,397 Joined: Dec 2013
RE: WP 34S solve an integral
Code:
... LBL 00 0                       //Lower bound of integral (from zero to solve guess) x <> Y ∫ 01 RCL 00                  //Value to solve for (to get upper integral bound) x <> Y -                       //Integral function returns zero when integral equals R00 target value RTN ...

Of course it doesn't matter whether you solve ∫ – 10 = 0 or 10 – ∫ = 0, so the second x<>y is not required, and a simple RCL–00 will do as well.
Or, even shorter:

Code:
LBL 00  0 ∫ 01      // ∫ from x to 0 = –∫ from 0 to x  RCL+ 00   // 10 – ∫ RTN

Sorry for the nitpicking. ;-)

(04-23-2015 09:05 PM)BarryMead Wrote:  Then Press 0 Enter 5 Enter 10 A (Solves for X where the integral of x² from zero to X = 10) = 3.10723250595
Try 3 Enter 7 Enter 20 A (Solves for X where integral of x² from zero to X = 20) = 3.91486764117

FTR: the exact solutions are the cube roots of 3·10 resp. 3·20.

Dieter
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 Messages In This Thread WP 34S solve an integral - lrdheat - 04-23-2015, 07:27 PM RE: WP 34S solve an integral - lrdheat - 04-23-2015, 08:43 PM RE: WP 34S solve an integral - BarryMead - 04-23-2015, 08:50 PM RE: WP 34S solve an integral - BarryMead - 04-23-2015, 09:05 PM RE: WP 34S solve an integral - Dieter - 04-24-2015 12:34 PM RE: WP 34S solve an integral - BarryMead - 04-24-2015, 02:46 PM RE: WP 34S solve an integral - CR Haeger - 04-23-2015, 10:28 PM RE: WP 34S solve an integral - BarryMead - 04-23-2015, 10:34 PM RE: WP 34S solve an integral - Dieter - 04-23-2015, 10:46 PM RE: WP 34S solve an integral - Marcus von Cube - 04-24-2015, 08:22 AM RE: WP 34S solve an integral - walter b - 04-24-2015, 08:57 AM RE: WP 34S solve an integral - CR Haeger - 04-24-2015, 01:24 PM RE: WP 34S solve an integral - Dieter - 04-24-2015, 12:16 PM RE: WP 34S solve an integral - CR Haeger - 04-24-2015, 01:01 PM RE: WP 34S solve an integral - Dieter - 04-24-2015, 01:09 PM RE: WP 34S solve an integral - rprosperi - 04-24-2015, 05:53 PM RE: WP 34S solve an integral - Thomas_Sch - 04-24-2015, 06:22 PM RE: WP 34S solve an integral - Dieter - 04-24-2015, 06:37 PM RE: WP 34S solve an integral - Dieter - 04-25-2015, 10:48 AM RE: WP 34S solve an integral - BarryMead - 04-25-2015, 06:59 PM RE: WP 34S solve an integral - Dieter - 04-25-2015, 08:54 PM RE: WP 34S solve an integral - lrdheat - 04-24-2015, 02:11 AM RE: WP 34S solve an integral - Thomas_Sch - 04-24-2015, 06:19 AM RE: WP 34S solve an integral - CR Haeger - 04-24-2015, 01:20 PM RE: WP 34S solve an integral - Thomas_Sch - 04-24-2015, 07:07 PM RE: WP 34S solve an integral - Dieter - 04-24-2015, 07:17 PM RE: WP 34S solve an integral - Thomas_Sch - 04-24-2015, 07:30 PM RE: WP 34S solve an integral - walter b - 04-24-2015, 10:12 PM RE: WP 34S solve an integral - Thomas_Sch - 04-24-2015, 10:27 PM RE: WP 34S solve an integral - lrdheat - 04-25-2015, 09:09 PM

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