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Problem using Solve or Nsolve
*To*: mathgroup at smc.vnet.net
*Subject*: [mg124736] Problem using Solve or Nsolve
*From*: droopy <tototo at yopmail.com>
*Date*: Fri, 3 Feb 2012 02:10:12 -0500 (EST)
*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com
Dear all,
I am a new user of mathematica and i am trying to find the upper limit of an integrate such as it is equal to a certain value.
Therefore, for the moment i did :
f = (4^x)*E^-4/Gamma[x + 1]; Reduce[{Integrate[f, {x, 0, A}] == 0.5}, {A}]
But it doesn't work, I did the same thing with Solve :
Solve[Integrate[f, {x, 0, A}] == 0.5, A]
but it doesn't work.
The only way that i found to obtain a solution was with FindRoot[Integrate[f, {x, 0, A}] == 0.5, {A, 2}]
Do you have a solution?
Thanks !
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