- #1

john.lee

- 4

- 0

## Homework Statement

y'=-5xy, y=?

## The Attempt at a Solution

i solved that,

dy/dx=-5xy

dy/y=-5x dx

∫(1/y)dy=∫-5x dx

= ln(lyl)= -2.5x^2+C

so, y=+- e^(-2.5x^2+C)

=+-K*e^(-2.5x^2)

but the answer is y=K*e^(-2.5x^2)

how can i understand this?

just shoud i ignore "the absolute value"?