||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

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{{{#Example 2, page no 4 var('x') y = function('y', x) f(x) = desolve(diff(y, x) + x/y, y) show(f(x)) var('c') f(x, y) = x**2 + y**2 - 2*c implicit_plot(f.subs(c=1), (-pi, pi), (-pi, pi)) }}}

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 * '''Solution by''': 
phanindra,student,nmrec