题目

The father’s role in the family is important. One researcher says babies cared for by their fathers have greater cognitive (认知的) development at one year of age than babies not cared for by their fathers. Another expert reports that by spending time with their pre-school children, fathers can help to develop children’s language ability. Researchers also point out that for school-age children, fathers are one link with the outside world.     Fathers who value education have children who do better in school than those children whose fathers don’t value education. What’s m已知满足不等式5－3x≤1的最小正整数是关于x的方程(a+9)x＝4(x+1)的解，求代数式a2－的值.