X =
1X = 5y =
2V2 x - l = 5 - x x = 3.Vay gid tri ldn nhdt ciia ham sd da cho bing
2V2 khi x = 3, gii tri nhdnha't ciia ham sd da eho bing
2 khi x =
1 hoac x = 5.14. jx - z| = |(x - y) + iy - z)\ Trong cdc bdi
tap td bdi 15 de'n bdi 25, ki hieu bd't phuong[r]