1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(Cr1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(CrB) 上交

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1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(Cr1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(CrB) 上交

1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(Cr1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(CrB) 上交
1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(Cr
1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(CrB) 上交

1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(Cr1.已知U=R,A={x丨-x∧2+2x+3>0},B={x丨x-2<0}求Au(CrB) 上交
解得,A={x|-1

(x<-1)u(x≥2)