闽南语歌典男子汉的汗

They were in his pocket.的肯、否定句回答?快点~~~~~~~~~~~有悬赏啊~~~~~~~~~~~~~ 求∫xe^（x^2）dx的不定积分要过程,详细滴,thanks They were in his pocket.改为否定句一般疑问句肯定回答否定回答 求不定积分∫xe*x dx 是e的x次方. 句型转换：they were in his pocket(同上）su hai took same photos at the sports day.nancy went to school early.we sang some english songs.they played football in the playgtound.同义 they were here yesterday变否定句和疑问句 They were at work at that time.（改为否定句和一般疑问句并作肯否定回答） 矩阵Am*n的秩为r,则AX=0的基础解系一定由（）个线性无关的解向量构成.本人线性代数的基础不是太好，最好请达人们提供一些相关的概念有助于我的理解 利用房屋墙壁用三面篱笆围成一个梯形菜地.已知篱笆的长是80米求这块地的面积.（高是20米） Were they talking loudly,or were they talking quietly?应该怎么回答? they were talking loudly是主谓宾吗 为什么 they were talking loudly when the teacher came in”when the teacher came in “划线对划线部分提问_________ _______ they talking loudly? The bus left.They were talking happily.(合并为一句)The bus left.They were talking happily.(合并为一句)The bus left _____ they were talking happily They were talking ( ) a film when come ( ) the room 利用房屋的墙壁用篱笆围成一个直角梯形鸡场,已知篱笆全长是20米,求这个面积斜边为6米,靠墙为5米（直角一边）是一个直角梯形. 线代,请问可以认为“矩阵满秩就是矩阵的所有行（列）向量线性无关”吗? 我国法定计算单位长度的基本单位是什么A毫米B厘米C分米D米 为什么说r个向量的秩 = 矩阵的秩 求不定积分∫xe^(-x)dx 求不定积分∫xe^(2-x²)dx 五年级有三个班,已知一班二班三班人数相等,一班男生人数等于二班女生某校五年级有三个班,已知一班,二班,三班的学生人数相等,一班男生人数等于二班女生人数,三班男生占所有男生的3/8, They played football after school.变成一般疑问句 如何证可逆实矩阵可分解为一个正交矩阵与一个正定矩阵的乘积 线性代数 的矩阵证明 (A^n)-1 = A^-n = (A^-1)^n 线性代数 设AB都是n阶对称矩阵,且AB也是对称矩阵,证明：AB=BA 线性代数 问a取什么值时下列向量组线性相关? a1=(a,1,1)^t,a2=(1,a,-1)^t,a3=(1,-1,a)^t (需全过程,谢谢 线性代数求解 问a取何值时向量组a1=(6,a+1,3)T,a2=(a,2,-2)T,a3=(a,1,0)T (1)线性相关?(2)线性无关? 线性代数 判断向量组a1=（1,1,1）,a2=（0,2,5）,a3=(1,3,6)的现行相关性越详细越好,最好有应用了哪条定理之类的. 图片上的m+2n=1是根据上面的方程简化出来的,但是我看了半天都没看出来是什么步骤,最详细的就是最佳答案,半小时以内一定采纳! 无论ab取任何有理数 都有4/5a³b的n+2次方+（m-1）a³b的四次方=0成立.试求代数式（m²-2mn+3n²）-5（m²+2mn-4n²）的值 矩阵A第一行1、1、2 第二行1、2、1第三行2、1、1 怎么求出A的5次方 设矩阵A=第一行1 1 1 1 第二行2 2 2 2 第三行-1 -1 -1 -1 第四行3 3 3 3 求A的n次方