convexite.py

Created on October 17, 2021

403 Bytes

fonction f est dite convexe sur I si
sa courbe est situee au dessus de chacune
de ses tangentes

fonction f est dite concave sur I si
sa courbe est situee en dessous de chacune
de ses tangentes

la fonction f deux fois derivable
sur un  I
la fonction f est convexe sur I ssi
fprime est croissante sur I
c est a dire fpp > 0 sur I
la fonction f est concave si fp 
est decroissante fpp<0

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