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