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）
M=N=R
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).
内容
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设A是m×n矩阵,B是n×m阶矩阵,E是m阶单位矩阵,若AB=E,则( ) A: R(A)=m,R( B: =mB、 R(A)=m,R(B)=n C: R(A)=n,R(B)=m D: R(A)=n,R(B)=n
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设A为m×n矩阵，B为n×，n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
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关系R有m个元组,关系S有n个元组,则R×S的元组个数是_______。 A: m + n B: m – n C: m× n D: m / n
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设A为m×n矩阵，B为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
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设\(A\)为\(m \times n\)矩阵，\(B\)为\(n \times m\)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: \(R(A)=n, R(B)=n\)