SOLUTION: Hi, Can you please help, . Solve {{{ e^x + e^(-x) = 5 }}}, for "x" . Thanks ahead of time, Levi

Question 168632: Hi, Can you please help,
.
Solve , for "x"
.
Thanks ahead of time, Levi
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Solve , for "x"
----------------

x =
x = 1.5668 (via calculator)
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This is not a rigorous solution. I'll work on it more tomorrow.
If you post it again, perhaps someone else can solve it.
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OK, I figured it out.

(a quadratic in e^x)
e^x = (5 + sqrt (21))/2
e^x = (5 - sqrt (21))/2
x = ln(above)

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