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is it a bug?!please help.

• To: mathgroup at smc.vnet.net
• Subject: [mg107199] is it a bug?!please help.
• From: olfa <olfa.mraihi at yahoo.fr>
• Date: Fri, 5 Feb 2010 03:23:14 -0500 (EST)

Hello mathematica community,
for Sum[k[i], {i, 1, n}] + Sum[k[i], {i, n + 1, m}]
why mathematica cannot give as output Sum[k[i],{i,1,m]]?!
please help.

• Follow-Ups:
  • Re: is it a bug?!please help.
    • From: Patrick Scheibe <pscheibe@trm.uni-leipzig.de>