amishra Solve for x: (e is part of logs) e^x + e^-x =3 one year ago one year ago

1. erica.d

e^x=y

2. erica.d

y^2-3y+1=0 solve for y

3. erica.d

i had solved this question when i was in sixth grade....this is fun lol :)

4. amishra

How did you get 1?

5. cinar

|dw:1347814545665:dw|

6. erica.d

$y+\frac{ 1 }{ y }=3......y^2+1=3y$

7. erica.d

8. amishra

I am not getting the answer, can you show me?

9. erica.d

well i was told to simplify it by quadratic i don't know further :p sorry lol y^2-3y+1=0

10. amishra

I didn't get the answer :/

11. cinar
12. cinar

x=ln(0.381966) x=ln( 2.61803) solutions..