_______he_________(not konw) how_______(finish)_______(do) his homework?it's wrong for him__(copy)others' homework

He brushes his teeth in the morning.(变为一般疑问句)_______he_________ _________ __________in the morning _______he_________(not konw) how_______(finish)_______(do) his homework?it's wrong for him__(copy)others' homework n n n n n^(n+1/n)/(n+1/n)^n 2^n/n*(n+1) (n+1)^n-(n-1)^n=? 证明不等式：(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n 是否存在一个自然数n 使(n+n)+(n-n)+n*n+n/n=1991 请问怎么输出下面的图形,要用C语言设计一程序 n n n n n n n n n n n n n n n n 推导 n*n!=(n+1)!-n! 化简：(n+1)!/n!-n!/(n-1)! (n-1)*n!+(n-1)!*n 根号（n+1)+n 有n(n N是自然数 N