Minichear parabòla air raon a reir comh-ordaghnaich Des Chartes, leis an co-ionnanas
y = a x 3 {\displaystyle y=ax^{3}}
mar sin d y d x = 3 a x 2 {\displaystyle {\frac {dy}{dx}}=3ax^{2}}
agus d 2 y d x 2 = 6 a x {\displaystyle {\frac {d^{2}y}{dx^{2}}}=6ax}
