Wednesday
December 24, 2014

Homework Help: calculus

Posted by dino on Monday, November 5, 2012 at 8:51pm.

Show that the tanget lines to the graph of Y= e^x - e^-x /e^x + e^-x at x =1 and x= -1 are parallel.
I know to use the Quotient rule but I am having a hard time with this problem.

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