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(a3b2)·(﹣a3b3c);

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A1.B3  B1.B2.B3  A2.A3.B2.B3  A1.A2.A3.B3  
若a+b+c≠3,则a2+b2+c2<3   若a+b+c=3,则a2+b2+c2<3   若a+b+c≠3,则a2+b2+c2≥3   若a2+b2+c2≥3,则a+b+c=3  
int x[][3]=0,1,1,2,3;  int x[4][3]=1,2,3,1,2,3,1,2,3,1,2,3;  int x[4][]=1,2,3,1,2,3,1,2,3,1,2,3;  int x[][3]=1,2,3,4;  
int X[][3]=0,1,1,2,3;  int X[4][3]=[1,2,3,1,2,3,1,2,31,2,3  int X[4][]=1,2,3,1,2,3,1,2,3,1,2,3;  int X[][3]=1,2,3,4;  
如果a+b+c≠3,则a2+b2+c2<3   如果a+b+c=3,则a2+b2+c2<3   如果a+b+c≠3,则a2+b2+c2≥3   如果a2+b2+c2≥3,则a+b+c=3  
int x[][3]={{0},{1},{1,2,3}};  int x[4][3]={{1,2,3},{1,2,3),{1,2,3},{1,2,3}};  int x[4][]={{1,2,3},{1,2,3},{1,2,3},{1,2,3}};  int x[][3]={1,2,3,4};  
若a+b+c≠3,则a2+b2+c2<3   若a+b+c=3,则a2+b2+c2<3   若a+b+c≠3,则a2+b2+c2≥3   若a2+b2+c2≥3,则a+b+c=3  
int x[ ][3]={{0},{1},{1,2,3}};  int x[4][3]={{1,2,3},{1,2,3},{1,2,3},{1,2,3}};  int x[4][ ]={{1,2,3},{1,2,3},{1,2,3},{1,2,3}};  int x[ ][3]={1,2,3,4};  
的坐标为(3,2),则点  点  点  的坐标分别是 图7-26 A.(3,-2)(-3,2)(-3,-2) B.(-3,2)(-3,-2)(3,-2) C.(2,-3)(-2,-3)(-2,3) D.(-2,3)(-2,-3)(2,-3)  
intx[][3]=0),1,1,2,3;  intx[4][3]=1,2,3,1,2,3,1,2,3,1,2,3;  intx[4][]=1,2,3,1,2,3,1,2,3),1,2,3;  int x[][3]=1,2,3,4;  
int x[][3]=0,1,1,2,3;  int x[4][3]=1,2,3,1,2,3,1,2,3,1,2,3;  int x[4][]=1,2,3,1,2,3,1,2,3,1,2,3;  int x[][3]=1,2,3,4;  
int x[][3]=0, 1, 1, 2, 3;  int x[4][3]=1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3;  intx[4][]=1, 2, 3), 1, 2, 3, 1, 2, 3), 1, 2, 3;  int x[][3]=1, 2, 3, 4;  
2;2;2;3;3;3;4;4;4  2;3;4;2;3;4;2;3;4  3;3;3;3;3;3;3;3;3  4;3;2;4;3;2;4;3;2  
int x[][3]=(0,1,1,2,3);  int x[4][3]=1,2,3,1,2,3,1,2,3,1,2,3);  int x[4][]=1,2,3,1,2,3,1.2,3,1,2,3);  int x[][3]=1,2,3,4;  
(2,3)或(﹣2,3)    (2,3)或(﹣2,﹣3)    (﹣2,3)或(﹣2,﹣3)    (﹣2,3),(﹣2,﹣3),(2,3)或(2,﹣3)  
a=3,b=2,c=3  a=-3,b=2,c=3   a=3,b=2,c=-3  a=3,b=-2,c=3  
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