Integral Hangs
02-18-2022, 02:28 PM
Post: #14
 Albert Chan Senior Member Posts: 2,611 Joined: Jul 2018
RE: Integral Hangs
(02-12-2022 03:22 PM)roadrunner Wrote:  works on xcas, but on the prime i get this error message:

"p:=subst('∫((1-e^(-2*x))/(1+e^(-4*x)),x)',x = (t/2))

It work if we replace symbol ∫ with words on the emulator

CAS> p:=subst('integrate((1-e^(-2*x))/(1+e^(-4*x)),x)',x = t/2)

integrate((1-e^(-2*t/2))/(1+e^(-4*t/2))/2,t)

CAS> expand(p(t=2x))

-1/2*atan(e^(2*x)) + 1/4*ln((e^(2*x))^2+1)

Or, simpler just map e^(n*x) with (e^x)^n

CAS> integrate(texpand((1-e^(-2*x))/(1+e^(-4*x))),x)

-1/2*atan((e^x)^2) + 1/4*ln((e^x)^4+1)
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 Messages In This Thread Integral Hangs - lrdheat - 02-05-2022, 06:15 PM RE: Integral Hangs - robmio - 02-06-2022, 06:38 AM RE: Integral Hangs - lrdheat - 02-06-2022, 04:33 PM RE: Integral Hangs - parisse - 02-08-2022, 06:56 PM RE: Integral Hangs - roadrunner - 02-12-2022, 03:22 PM RE: Integral Hangs - Albert Chan - 02-18-2022 02:28 PM RE: Integral Hangs - lrdheat - 02-09-2022, 03:34 AM RE: Integral Hangs - lrdheat - 02-09-2022, 04:42 AM RE: Integral Hangs - parisse - 02-10-2022, 07:39 AM RE: Integral Hangs - roadrunner - 02-12-2022, 03:43 PM RE: Integral Hangs - lrdheat - 02-12-2022, 06:05 PM RE: Integral Hangs - parisse - 02-15-2022, 01:40 PM @Bernard re: Xcas - Guenter Schink - 02-15-2022, 08:38 PM RE: Integral Hangs - parisse - 02-16-2022, 04:34 PM RE: Integral Hangs - roadrunner - 02-18-2022, 07:29 PM

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