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Limit[Sqrt[a^2-2 x c]/x,x->0] fails

  • To: mathgroup at smc.vnet.net
  • Subject: [mg17447] Limit[Sqrt[a^2-2 x c]/x,x->0] fails
  • From: "Neal E. Tornberg" <neal.e.tornberg at boeing.com>
  • Date: Sun, 9 May 1999 04:43:53 -0400
  • Organization: Boeing
  • Sender: owner-wri-mathgroup at wolfram.com

If I remember elementary calculus, the limit is -c/a
The internal Limit gives DirectedInfinity[-a + Sqrt[a^2]) (formatting
excised)
After <<Calculus`Limit` I get
 On::"none": "Message \!\(Power :: \"infy\"\) not found."
On::"none": "Message \!\(Power :: \"indet\"\) not found."
On::"none": "Message \!\(\\[Infinity] :: \"indet\"\) not found."
General::"stop": 
    "Further output of \!\(On :: \"none\"\) will be suppressed during
this \
calculation."

For Limit[Sqrt[(25 + 2 x 3] - 5)/x, x -> 0] they both give 3/5 so at
least THAT works.

HELP! Please. How do I get this to work so I can address more general
cases where the solution isn't so obvious?
-- 
Neal E. Tornberg
neal.e.tornberg at boeing.com

Nobody here thinks I speak for Boeing.
You shouldn't either.



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