Question

There is a rather simple equation in my textbook in Physics but I'm missing a minus somewhere. Some help will be appreciated.

Answer 1

Here it is:
\[-i \frac{ d }{ dx }f(x) = kf(x)\]

Answer 2

So, I separate the variables to:
\[\frac{ df(x) }{ f(x) }=-ik d(x)\]
Which becomes \[e^{-ikx}+C\]
However, they don't give a minus in the exponent.

Answer 3

\(\large \frac{ df(x) }{ f(x) }=-\frac{k}{i} d(x) \)

Answer 4

right ?

Answer 5

1/i = -i

so negative cancels out

Answer 6

You should recognize that 1/i = -i.

Answer 7

aah, right

Answer 8

yeah, I made a mistake and put i in the numerator

Answer 9

thank you both!

Answer 10

Ganeshieeeeeeeee!

Answer 11

you trolling @beccaboo333 :)

Answer 12

u wlc @suzanka !

Answer 13

>_> ~leaves~ sorry guys