【单选题】已知 a 1 , a 2 是齐次线性方组 AX = 0 的基础解系, b 1 , b 2 是非齐次线性方程 AX = b 的两个不同的解向量, k 1 , k 2 为任意常数 , 则 AX = b 的通解为( )。
A.
k 1 a 1 + k 2 a 2 + ( b 1 - b 2 )
B.
k 1 b 1 + k 2 b 2 + ( a 1 - a 2 )
C.
k 1 a 2 + k 2 ( a 1 + a 2 ) + ( b 1 + b 2 )
D.
k 1 a 1 + k 2 ( b 1 - b 2 ) + ( b 1 + b 2 )
【单选题】设α 1 ,α 2 是非齐次线性方程组 Ax=b 的解,又已知 k 1 α 1 +k 2 α 2 也是 Ax=b 的解,则 k 1 +k 2 =__________.
【单选题】已知a1,a2是非齐次线性方程组Ax=b的两个不同的解,b1,b2是其导出方程组Ax=0的基础解系,k1,k2是任意常数,则方程组Ax=b的通解是
A.
k1b1+k2(b1+b2)+(a1-a2)/2
B.
k1b1+k2(b1-b2)+(a1+a2)/2
D.
k1(b2-b1)+k2(b1-b2)+(a1+a2)/2
【简答题】Recently, professor of philosophy(哲学)in the United States has written a book called Money and the Meaning of Life. He has discovered that how we deal with money in our daily life has more meaning than...
【多选题】安全评价的主要目的是运用安全系统工程的原理和方法,识别和评价系统中存在的危险、有害因素。在进行安全评价时,通常要选用不同的安全评价方法。安全评价的方法很多,常用的分类方法有( )。
【简答题】Recently, a professor of philosophy in the United States has written a book called Money and the Meaning of Life.He has discovered that how we deal with money in our day-to-day life has more meaning t...
【简答题】Recently a professor of philosophy(哲学)in the United States has written a book called Money and the Meaning of Life. He has discovered that how we deal with money in our day to day life has more meanin...