# Line integration homework question

1. Nov 27, 2011

### amenforramen

1. The problem statement, all variables and given/known data
Consider two expressions (df=ydx-xdy) and (dg=ydx+xdy). One is an exact differential, the other is not. Evaluate the line integral for each over the following paths:

a) in a straight line form (1,1) to (2,2)
b) a straight line from (1,1) to (2,1), then a straight line from (2,1) to (2,2)
c) A closed loops consisting of straight lines from (1,1) to (2,1) to (2,2) to (1,1)

2. Relevant equations

3. The attempt at a solution
a)
Well I know dy/dx = 1, so y=x for this first equation... so I think from (1,1) to (2,2) ydx-xyd = 0? .... euh