Exercice 2 : les nombres relatifs..
Calculer
A=(-5) + [(-4) (-2)+(+7)]. =
B=(-4) x ( - 2)x( - 3) - (- 3) x ( - 2).
C=(+6) - (- 9) + (-3)x [(-5)x( -2) - 3).

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)