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

Multiply everything through by ex   and rearrange so it equals zero
you now have e2x -ex-6=0
It is now similar to a quadratic equation, make the dummy substitution y=ex
y=3 or -2 
x= ln(3) and ln(-2) does not exist 

Kishwar I. avatar
Answered by Kishwar I. Maths tutor

9862 Views

See similar Maths A Level tutors
Cookie Preferences