Integrate[(1 - Exp[-kel*t]), {t, 0, Infinity]?=-1/kel

*To*: mathgroup at smc.vnet.net*Subject*: [mg24383] Integrate[(1 - Exp[-kel*t]), {t, 0, Infinity]?=-1/kel*From*: GyA Csanady <csanady at gsf.de>*Date*: Wed, 12 Jul 2000 23:13:23 -0400 (EDT)*Organization*: gsf*Sender*: owner-wri-mathgroup at wolfram.com

Dear MathGroup, I integrated the function (1 - Exp[-kel*t]) between zero and Infinity by using Mathematica 4 and assuming that kel is positiv: Integrate[(1 - Exp[-kel*t]), {t, 0, Infinity}, Assumptions -> kel > 0] Mathematica resulted in a finite integral being ?1/kel. This result is obviously wrong since the function investigated does not have a finite integral. However I am not sure what is wrong. Any help will be appreciated. With best regards Gy. Csanady