evaluate i= intigra{(2x-y)}dx + (2y+x)dy} around the boundary c of the ellipse x^2 + 9y^2= 16
please am just lost in the question and i do not know how to know the pi to use when solving it. some one should please help me.
thank you

Question

evaluate i= intigra{(2x-y)}dx + (2y+x)dy} around the boundary c of the ellipse x^2 + 9y^2= 16
          please am just lost in the question and i do not know how to know the pi to use when solving it. some one should please help me. 
thank you

anonymous · Answer

The answer is 2

anonymous · Answer

please is that for pi or for the whole soluction?

anonymous · Answer

i saw 2 but i=2A. and the answer here is 32pi/3. how was it gotten?