... ph Bi 32 ( 19- SGK) 25 49 a) 0,01 = 16 16 100 25 49 7 = = = 16 100 10 24 d) 1 49 76 (1 49 76)(1 49 + 76) = 457 384 (457 384)(457 + 384) 225.73 225 225 15 = = = 841.73 841 841 29 Bi 36 (20-SGK) ... 2.7 + + 9x y + yx ( x 0; y o) x x + x + 19 ỏp ỏn Cõu ( 4im) : CTTQ ( sgk ) Cõu ( 6im) 2.7 + + =6 x y + yx ( x 0; y o) = 4x y x x + x + 19 =2 x + 19 e Hng dn v nh: - Lm bi 56, 57, 58, 59, 60 ... III lm bi 69 cõu a 135 54.3 = 27 27.8 = = Bi 69 (36-SGK) a) = 53 = 125 cú 125 > 123 > 123 b) e Hng dn v nh: - c bi c thờm - Lm cõu hi ụn chng - Lm bi 70, 71, 72 ( 40 - SGK ) 96 , 97 , 98 ( 18...