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#### LATEBLOOMER

##### New member

- Aug 7, 2013

- 21

$\displaystyle M(x,y)\,dx+N(x,y)\,dy=0$

$\displaystyle \frac{dy}{dx}=f(x,y)$

$\displaystyle F(x,y,y'....y^n)=0$

what's M and N and the ordered pair (x,y) mean here.

I don't understand my book. please explain.