Let a > 0. Let x ϵ (0,a) and y ϵ (0,a). Use the fact that cosh is a primitive of sinh to prove that |sinh y - sinh x| ≤ (cosh a)|y - x| Thanks very much for any help.
Last edited by feyomi; May 26th 2010 at 11:26 AM.
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Use the mean value on on the interval . Note that if .
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