直线2y+3z=5,x-2y-z=7,即(x-12)/2=(2y-5)/3=z/(-1),它在xoy面上的投影是z=0,(x-12)/2=(2y-5)/3.
La clé publique RSA générée est combinée aux informations d'identité de l'ASA pour former une demande de certificat PKCS#10. Vous devez identifier distinctement le nom de clé avec le point de confiance pour lequel vous créez la paire de clés. Procédure ASDM ...
2x-y+z=2 (1)x-2y-z=7 (2)x+y-2z=7 (3)(1)+(2)3x-3y=9 x-y=3 (4)(1)*2+(3)5x-y=11 (5)(5)-(4)4x=8 所以 x=2 y=5x-11=-1 z=x-2y-7=-3
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对称式由直线上一点和直线的方向向量决定(1)先求一个交点,将z随便取值解出x和y不妨令z=0由x+2y=7-2x+y=7解得x=-7/5,y=21/5所以(-7/5,21/5,0)为直线上一点(2)求方向向量因为两已知平面的法向量为(1,2,-1),(-2,1,1)所... 分析总结。 对称式由直线上一点和直线的方向向量决定1先...
如图
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