## S 4 years ago find dy/ dx and simplify : y=lnx/e^(2x) ?

1. anonymous

dy/dx= (1_2xlnx)/xe^(2x)

2. anonymous

or you can write it : dy/dx=(1/xe^(2x)) _2y

3. anonymous

i am confused , what exactly I have to do in this problem..

4. anonymous

use quotient rule:$\large \frac{\frac{e^{2x}}{x} + 2\ln x (e^{2x})}{e^{4x}}$

5. anonymous

that's supposed to be minus not plus

6. anonymous

ok, thanks! I just didn't knew which rule to apply

7. anonymous

QUOTIENT RULE $\frac{ldh - hdl}{l^2}$ where l = low; h = high; d = derivative