设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a
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设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a设全集是实数集R,A={X|2x^2-7x+3≤0}
设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a
设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a
设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a
A={X|0.5≤X≤3},B={X|-(-a)^0.5
设全集是实数集R,A={X|2X.X-7X+3
设全集是实数集R,A={x|2x^2-7x+3
设全集是实数集R,A={X|1/2≤X≤3},B={X|X+a
设全集是实数集R,A={X|1/2≤X≤3},B={X|X+a
设全集是实数集R,A={X|1/2≤X≤3},B={X|X2 a
设全集是实数集R,A={x|y=√7x-2x∧2-3},B={x|x∧2+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|2x^2-7x+3≤0},B={X|y^2+a
设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a
设全集是实数R,A={x|2x^2-7x+3≤0},B={x|x^2+a
设全集是实数集R,A={x|2x²-7x+3≤0}……设全集是实数集R,A={x|2x²-7x+3≤0},B={x|x²-4<0},求A∩B和A∪B.
设全集是实数集R,M={x|-2≤x≤2},N={x|x
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设全集U是实数集R,M={x|x2},N={x|x^2-4x+3
设全集是实数集R,A={X|1/2≤X≤3},B={X|X²+a
设全集是实数集R,A={X|1/2≤X≤3},B={X|X²+a
设全集是实数集R,A={X|1/2≤X≤3},B={X|X²+a