amishra 3 years ago Solve for x: (e as in logs) a) 3e^x -5 = -2e^-x b) 2ln x - 3ln(1/x) =10

1. chandhuru

|dw:1347804062395:dw| is this the ques ????

multiply by e^x and let it be k

3. chandhuru

for second one use ln(1/a) = - ln(a)

\[3(e^{x})^2-5e^x=-2\] \[3k^2-5k+2=0\]

5. amishra

@Jonask , what? Can you rephrase? @chandhuru , yes, thats the question. :)

6. chandhuru

hmmm.. then

7. chandhuru

|dw:1347804343788:dw| take LCM you will get a quadratic eqn solve it

8. chandhuru

9. amishra

how did you get this?

10. chandhuru

i should u steps ...see the steps listed above..

11. amishra

I am sorry, I didn't get it :/

12. chandhuru

which step u dont understand????

13. amishra

OKay, got it, can you tell me the second one?

14. chandhuru

use the formula ln(1/a) = - ln(a)

15. amishra

lemme try :)

16. chandhuru

got it ah????

17. amishra

No, can you please show the steps?

18. chandhuru

ok..

19. chandhuru

|dw:1347805590065:dw| now solve it...

20. chandhuru

got it ???

21. amishra

Oh! I got it!! Thank you! :D Soo much!

22. chandhuru

ok.. welcome..