M={(x,y)|(y-3)/(x-2)=a+1},N={(x,y)|(a^2-1)x+(a-1)y=15},若M交N=空集,则a=?
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M={(x,y)|(y-3)/(x-2)=a+1},N={(x,y)|(a^2-1)x+(a-1)y=15},若M交N=空集,则a=?M={(x,y)|(y-3)/(x-2)=a+1},N={(x,y
M={(x,y)|(y-3)/(x-2)=a+1},N={(x,y)|(a^2-1)x+(a-1)y=15},若M交N=空集,则a=?
M={(x,y)|(y-3)/(x-2)=a+1},N={(x,y)|(a^2-1)x+(a-1)y=15},若M交N=空集,则a=?
M={(x,y)|(y-3)/(x-2)=a+1},N={(x,y)|(a^2-1)x+(a-1)y=15},若M交N=空集,则a=?
a = 1 或 -1 或 5/2 或 -4
a=-1
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填空:1.(1)2m(y-x)^2=( )(x-y)^2填空:1.(1)2m(y-x)^2=( )(x-y)^2(2)-2m(y-x)^3=( )(x-y)^3( 3 ) (x+y)(y-x)=-(x+y)( )( 4 ) -m(y-x^2)=m( )