ecuació diferencial

d_{x}[y(x)] = sum[ ( k!·x )^{k} ]

y(x) = sum[ (1/k!)·( (k+(-1))!·x )^{k} ]

p = k+(-1)

d_{x}[y(x)] = sum[ ( (1/k!)·x )^{k} ]

y(x) = sum[ ( (k+(-1))!/k )·( ( 1/(k+(-1))! )·x )^{k} ]

p = k+(-1)