Le but de l’exercice est de déterminer le sens de variation de la fonction f:x (x−3)²+1 définie
sur IR.
1. Tracer la courbe représentative de la fonction f à l’aide de la calculatrice et observer les
variations de f.
2. Étude :
a. Soient a carré, que (a−3)²>(b−3)².
b. En déduire que f(a)>f(b) et que f est strictement décroissante sur ]−∞;3].
c. Soit 3⩽a croissante sur [3;+∞[.
d. Dresser le tableau de variations de f.

Cor d? ? me ? max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.