Question

e^x=-x solve for x

Answer 1

apply ln (natural log) of both sides

Answer 2

what I have to do here?
take left hand side... =e^x ...take log ... xlne =x....=R.H.S

Answer 3

\[x=\ln(-x)\]

Answer 4

All this tells me is that x must be negative, otherwise the log function will be broken.

Answer 5

I know there's an answer because the graphs of y=e^x and y=-x intersect at some point.

Answer 6

x should be positive I think so thats why we take mood like ln|x|

Answer 7

good luck
algebra will not do it

Answer 8

you will use technology or numerical methods

Answer 9

http://www.wolframalpha.com/input/?i=e^x%3D-x

Answer 10

Damn, there's no alternative trick then? Hmm.