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solve the following exponential expression.

e^x+e^-x=6

  • math -

    e^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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