- #1

DocZaius

- 365

- 11

## Homework Statement

Solve for A:

dA/ds = -k s

## Homework Equations

See problem statement

## The Attempt at a Solution

I switched the equation around:

dA= -k s ds

Integrated:

A= -(k/2) (s^2+c)

Apparently, that is wrong and I see that the answer should be:

A= -(k/2) (s^2-b^2)

My question is: Why must the constant of integration subtract from s^2? Why couldn't it add to it?