Re: compute limit
- To: mathgroup at smc.vnet.net
- Subject: [mg70573] Re: compute limit
- From: "ben" <benjamin.friedrich at gmail.com>
- Date: Fri, 20 Oct 2006 05:21:35 -0400 (EDT)
- References: <eh79cr$dpb$1@smc.vnet.net>
Dear Frank,
you have to tell Mathematica sth about your
variables, i.e. which is real, positive, ...;
otherwise Mathematica assumes them to be complex.
But for arbitrary complex numbers a closed solution
need not exist.
Try this
Limit[((1 + r)^t*(1 - s) + s)^(1/t) - 1, t -> \[Infinity],
Assumptions -> {r > 0, s > 0, s < 1}]
Bye
Ben
Frank Hechtner schrieb:
> Hi,
>
> i?m in trouble with the calculation of limits. my expression is the
> following
>
> ((1 + r)^t*(1 - s) + s)^(1/t) - 1, t -> ?
>
> as you see, the limit is r when x approaches ?.
>
> Unfortunately when using limit the output is
>
> Limit[((1 + r)^t*(1 - s) + s)^(1/t) - 1, t -> ?].
>
> I dont see whats going wrong. Does limit only compute numerical expression?
>
> Thanks for your help
>
> Frank