[Bug or Suggestion]About HP Prime G1 New Beta Firmware
11-22-2019, 06:03 PM
Post: #2
 Albert Chan Senior Member Posts: 2,516 Joined: Jul 2018
RE: [Bug or Suggestion]About HP Prime G1 New Beta Firmware
(11-22-2019 08:37 AM)yangyongkang Wrote:  (ii)
Code:
int(atan(x)/(x^2*(1+x^2)),x)
Hp prime didn't figure it out, this is the result of Wolfram Alpha

For XCas, it needed a nudge: $${1\over x^2(x^2+1)} = {1 \over x^2} - {1 \over 1+x^2}$$

∫ (atan(x)/(x^2*(1+x^2)) dx = ∫ atan(x) d(-1/x) - ∫ atan(x) d(atan(x))

Xcas> int(partfrac(atan(x)/(x^2*(1+x^2))),x) ﻿ ﻿ ﻿ ﻿ → -atan(x)^2/2 + ln(x^2)/2 - ln(x^2+1)/2 - atan(x)/x
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 Messages In This Thread [Bug or Suggestion]About HP Prime G1 New Beta Firmware - yangyongkang - 11-22-2019, 08:37 AM RE: [Bug or Suggestion]About HP Prime G1 New Beta Firmware - Albert Chan - 11-22-2019 06:03 PM RE: [Bug or Suggestion]About HP Prime G1 New Beta Firmware - yangyongkang - 11-23-2019, 02:18 AM RE: [Bug or Suggestion]About HP Prime G1 New Beta Firmware - yangyongkang - 11-29-2019, 02:38 PM RE: [Bug or Suggestion]About HP Prime G1 New Beta Firmware - yangyongkang - 12-04-2019, 01:32 PM

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