Posted - 12/04/2003 : 20:34:29
Lam may bai nay di ba con
1. Tim nguyen ham dx/(x^5+1) => cach lam tong quat cho dx/(x^n+1) (n thuoc N+)
2. Tim nghiem nguyen 2^x + 2^y + 2^z =2336( qua easy rui)
3. Bao nhieu so co dang abcdef( a>=b>=c>=d>=e>=f) (qua de luon)