Solve equation with summation?
- To: mathgroup at smc.vnet.net
- Subject: [mg122945] Solve equation with summation?
- From: Ivan <iveney at gmail.com>
- Date: Fri, 18 Nov 2011 06:21:48 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
For a summation like \sum_{i=1}^n a_i/x = 1,
Solve[Sum[Subscript[a, i], {i, 1, n}]/x == 1, x]
gives a correct solution.
However, by putting x into the summation:
Solve[Sum[Subscript[a, i]/x, {i, 1, n}] == 1, x]
gives an empty set, why?