Exponentials

*To*: mathgroup at smc.vnet.net*Subject*: [mg53867] Exponentials*From*: Bruce Colletti <vze269bv at verizon.net>*Date*: Tue, 1 Feb 2005 04:08:16 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Re Mathematica 5.1 under WinXP Home. When I enter Product[x^t[k], {k, 1, 3}] the result is as expected, x^(t[1]+t[2]+t[3]). However, when the upper limit is the uninstantiated variable n, the output is the input itself, i.e., Product[x^t[k], {k, 1, n}]. What I want is x^Sum[t[k],{k,1,n}]. Although I can easily get this using patterns, is there a simpler way that uses some option (in Simplify or FullSimplify) or some other command? Thanks. Bruce