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September 21, 2014

September 21, 2014

Posted by **Austin** on Friday, January 4, 2013 at 12:04am.

e^x+e^-x=6

- math -
**Reiny**, Friday, January 4, 2013 at 12:34ame^x + e^-x = 6

e^x + 1/e^x = 6

hint:

let e^x = y

y + 1/y = 6

each term by y

y^2 + 1 = 6y

y^2 - 6y + 1 = 0

solve for y, then sub back into e^x

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