设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使...设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使(A∪B)∩C=∅?已知答案为不存
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![设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使...设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使(A∪B)∩C=∅?已知答案为不存](/uploads/image/z/4531822-70-2.jpg?t=%E8%AE%BE%E9%9B%86%E5%90%88A%3D%7B%28x%2Cy%29%7Cy%5E2-x-1%3D0%7D%2CB%3D%7B%28x%2Cy%29%7C4x%5E2-2x-2y%2B5%3D0%7D%2CC%3D%7B%28x%2Cy%29%7Cy%3Dkx%2Bb%7D%2C%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8k%2Cb%28k%2Cb%E7%9A%86%E4%B8%BAN%2A%29%2C%E4%BD%BF...%E8%AE%BE%E9%9B%86%E5%90%88A%3D%7B%28x%2Cy%29%7Cy%5E2-x-1%3D0%7D%2CB%3D%7B%28x%2Cy%29%7C4x%5E2-2x-2y%2B5%3D0%7D%2CC%3D%7B%28x%2Cy%29%7Cy%3Dkx%2Bb%7D%2C%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8k%2Cb%28k%2Cb%E7%9A%86%E4%B8%BAN%2A%29%2C%E4%BD%BF%28A%E2%88%AAB%29%E2%88%A9C%3D%26%238709%3B%3F%E5%B7%B2%E7%9F%A5%E7%AD%94%E6%A1%88%E4%B8%BA%E4%B8%8D%E5%AD%98)
设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使...设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使(A∪B)∩C=∅?已知答案为不存
设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使...
设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使(A∪B)∩C=∅?
已知答案为不存在,球思路.
设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使...设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使(A∪B)∩C=∅?已知答案为不存
设集合A={(x,y)|y²-x-1=0},B={(x,y)|4x²-2x-2y+5=0},C={(x,y)|y=kx+b},是否存在k,b(k,b皆为N*),使(A∪B)∩C=∅?
集合A是抛物线y²=x+1上的点的集合,此抛物线顶点在(-1,0),且开口朝右.定义域为
x≧-1,值域为-∞
C:y=kx b上所有的点 A∪C:x=-1和y=kx b上所有的点 B∩C一定是空无解。(1-k)^2-4*2*(2.5-b)