1) which one is correct
Among the following numbers -3/2 ,-13/-9,1 , 0, -2二次方
a) arrange all positive numbers in ascending order
b) arrange all negative numbers in descending order
c) arrange the above numbers in descending order
2) 為什麼下列不是多項式 Polynomial
a) 變數(unknown)不能作為分母 (e.g. 分母是 x + 2,不是多項式)
b) 變數(unknown)不能有分數指數 (e.g. a二分一次方,不是多項式)