已知全集U=R,集合A={x|x2+ax+12b=0},B={x|x2-ax+b=0},满足(CuA)▽B={2},(CuB)▽A=...已知全集U=R,集合A={x|x2+ax+12b=0},B={x|x2-ax+b=0},满足(CuA)▽B={2},(CuB)▽A={4},求实数a、b的值.(此处▽表示交集)我求出a=

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