B=90°时，M`N,R的关系是()。（用M、N、R之间的大于号或小于号表示）
举一反三
- 设矩阵\(A\)为\(m \times n\)矩阵，则矩阵\(A\)的秩\(R(A)\)与\(m, n\)之间的关系是 A: \(R(A)=m\) B: \(R(A)=n\) C: \(R(A) \le \min(m,n) \) D: \(R(A) \ge \min(m,n) \)
- 下面程序的功能是用“辗转相除法”求两个正整数的最大公约数。请分析程序填空。#includemain(){intr,m,n;scanf("%d%d",&m,&n);if(m A: 【1】r=m,m=n,n=r;【2】m%n; B: 【1】m%n;【2】r=m,m=n,n=r; C: 【1】r=m,m=n,n=r;【2】n%m; D: 【1】n%m;【2】r=m,m=n,n=r;
- 求给定自然数m和n的最大公约数。请完善程序。 Private Sub Command1_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r Do r = m Mod n m = n n = r Loop Until__________ Text3.Text = m End Sub Private Sub Command2_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r r = m Mod n Do Until _______ m = n n = r r = m Mod n Loop Text3.Text =____ End Sub Private Sub Command3_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r Do r = m Mod n m = n n = r Loop While________ Text3.Text =______ End Sub Private Sub Command4_Click() Dim m As Integer, n As Integer, r As Integer m = Text1.Text n = Text2.Text If m < n Then r = m: m = n: n = r r = m Mod n Do While______ m = n n = r r = m Mod n Loop Text3.Text =____ End Sube73f1fd63959cc8362d8c82d419c2353.png
- 设A是m×n矩阵，B是n×m矩阵，E为m阶单位矩阵，若AB＝E，则（）。 A: r（A）＝m，r（B）＝m B: r（A）＝m，r（B）＝n C: r（A）＝n，r（B）＝m D: r（A）＝n，r（B）＝n
- 设A是m×n矩阵，B是k×n矩阵，证明或A是m×r矩阵，B是m×n矩阵，则有max｛R(A),R(B)｝≤R((A,B))≤R(A)＋R(B)．设A是m*n矩阵,B是n*m矩阵,证明:若r(A)=n,则r(AB)=r(B).