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Solve e^x-6e^-x=1

Multiply everything through by e^xand rearrange so it equals zero
you now have e^2x-e^x-6=0
It is now similar to a quadratic equation, make the dummy substitution y=e^x
y=3 or -2
x= ln(3) and ln(-2) does not exist

Answered by Kishwar I. • Maths tutor

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