设全集是实数集R,A={x丨2x²-7x+3≤0},B={x丨x²+a
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![设全集是实数集R,A={x丨2x²-7x+3≤0},B={x丨x²+a](/uploads/image/z/2715938-26-8.jpg?t=%E8%AE%BE%E5%85%A8%E9%9B%86%E6%98%AF%E5%AE%9E%E6%95%B0%E9%9B%86R%2CA%3D%EF%BD%9Bx%E4%B8%A82x%26%23178%3B-7x%2B3%E2%89%A40%EF%BD%9D%2CB%3D%EF%BD%9Bx%E4%B8%A8x%26%23178%3B%2Ba)
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设全集是实数集R,A={x丨2x²-7x+3≤0},B={x丨x²+a
设全集是实数集R,A={x丨2x²-7x+3≤0},B={x丨x²+a
设全集是实数集R,A={x丨2x²-7x+3≤0},B={x丨x²+a
(1)A∩B=[1/2,2),AUB=(-2,3]
(2)-1/4