màxims y mínims

( d_{x}[f(c+h)]+(-1)·d_{x}[f(c)] )/d[x] = d_{xx}^{2}[f(c)]

d_{x}[f(c)] = 0

d_{xx}^{2}[f(c)] [< 0

d[f(c+h)] [< 0

f((c+h)+h) [< f(c+h)

màxim en x = c

d_{xx}^{2}[f(c)] >] 0

d[f(c+h)] >] 0

f((c+h)+h) >] f(c+h)

mínim en x = c