Re: double integral problem
- To: mathgroup at smc.vnet.net
- Subject: [mg112554] Re: double integral problem
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Sun, 19 Sep 2010 05:41:02 -0400 (EDT)
You have not defined the variable a so numeric techniques will not work.
Manipulate[
NIntegrate[
Exp[-a/(4 x) - 4 x],
{Q, 0, 1}, {x, 0, Q}],
{a, 0, 5, Appearance -> "Labeled"}]
Plot[NIntegrate[
Exp[-a/(4 x) - 4 x],
{Q, 0, 1}, {x, 0, Q}],
{a, 0, 5}]
Bob Hanlon
---- Regina <regina.lagrasta at googlemail.com> wrote:
=============
hi there,
im trying to evaluate the following double integral:
N[Integrate[Integrate[Exp[-a/(4 x) - 4 x], {x, 0, Q}], {Q, 0, 1}]]
and set a to 1 or some other non-zero number.
but for some reason, mathematica only gives me error messages. what am
i doing wrong?
best. regina