**TI89**statikTextObject file 02/25/05, 19:47Rmoyennes ã¥Z‰… ARITHMETIQUE 1/nŽ(n—.x—) GEOMETRIQUE (ŒX—)^(1/n) = (x1*x2*...*xn)^(1/n) HARMONIQUE 1/nŽ(1/x—) =(1/x1+1/x2+1/xn)/n àÃ"