Subido por Saul Jefferson Achanccaray Ayquipa

ANGELO148

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148.
(2 x  y cos( xy ))dx  x cos( xy ) dy  0
dm  ydx
x
m cos m
dm  ydx
(2 x 
) dx  x cos( m)(
)0
x
x
m cos m
m
(2 x 
) dx  cos m( dm  dx)  0
x
x
m cos m
m
(2 x 
) dx  cos mdm  cos mdx  0
x
x
2 xdx  cos mdm  0
m  xy......dm  xdy  ydx.....dy 
 2 xdx   cos mdm   0
x 2  sen( xy )  c
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