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Re: Integral confusion

• To: mathgroup at smc.vnet.net
• Subject: [mg107284] Re: [mg107262] Integral confusion
• From: "Tony Harker" <a.harker at ucl.ac.uk>
• Date: Mon, 8 Feb 2010 03:33:54 -0500 (EST)
• References: <201002071112.GAA25294@smc.vnet.net>

It's not wrong: remember there's an arbitrary constant of integration, so
you can rewrite the result in terms of the Log[x+1] and Log[x+6] that you
were probably expecting.

  Tony 

]-> -----Original Message-----
]-> From: Jon Joseph [mailto:josco.jon at gmail.com] 
]-> Sent: 07 February 2010 11:13
]-> To: mathgroup at smc.vnet.net
]-> Subject: [mg107262] Integral confusion
]-> 
]-> All: Is this integral wrong? If not could someone explain 
]-> the minus sign 
]-> inside the log?
]-> 
]-> Integrate[1/(x + 1) - 1/(x + 6), x] // Simplify
]-> 
]-> log(-2 (x + 1)) - log(2 (x + 6))
]-> 
]-> Thanks, Jon.=
]-> 
]-> 

• References:
  • Integral confusion
    • From: Jon Joseph <josco.jon@gmail.com>