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Re: Simplify and Square Root Ratios

• To: mathgroup at smc.vnet.net
• Subject: [mg42172] Re: [mg42146] Simplify and Square Root Ratios
• From: Bobby Treat <drmajorbob-MathGroup3528 at mailblocks.com>
• Date: Sat, 21 Jun 2003 02:49:46 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

If it helps, Version 5 does what you expect in all three cases.

Bobby

-----Original Message-----
From: Blimbaum Jerry DLPC <BlimbaumJE at ncsc.navy.mil>
To: mathgroup at smc.vnet.net
Subject: [mg42172] [mg42146] Simplify and Square Root Ratios

Just a comment on result i got with Simplify and Square roots.....4.2 
version.... Surprizng behavior (to me anyway) of Simplify for putting 
variables in Square Roots together (FullSimplify gives same result): 
expr1 = Sqrt[a+c] / Sqrt[b] Simplify[expr1,{ a&gt;0,b&gt;0}] outputs 
Sqrt[(a+c)/b].....as I wanted and expected... but Simplify[expr1,{ 
a&gt;0,b&gt;0,c&gt;0}] outputs 1/ Sqrt[b/(a+c)].......which, of course, 
surprized me..... and expr2 = Sqrt[a+b] / Sqrt[b] Simplify[expr2,{ 
a&gt;0,b&gt;0}] outputs 1/ Sqrt[b/(a+b)].......which also surprized 
me..... Jerry Blimbaum