then (e^(x)+e(-x)/2)=3 is y + 1/(2y) = 3 2y^2 - 6y + 1 = 0 by quadratic formula y = 2.8229 or y = .17712 then e^x = 2.8229 x = ln(2.8229) = 1.037756 or e^x = .17712 x = ln(.17712) = -1.7309
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