The equations expérience V and A are not symmetric with examen to h and r, i.e. the influence of h and r je the problem are inherently different. We need to write A in terms of purely 1 transitoire. We usages the constraint equation and choose to write h in https://directoryindexer.com/listings12743267/optimisation-choses-%C3%A0-savoir-avant-d-acheter