若集合A={x|log(1/2)x≥1/2},则CRA=(1/2)是底数A,(-无穷大,0】∪(√2/2,+无穷大)B,(√2/2,+无穷大)C,(-无穷大,0∪【√2/2,+无穷大)D,【√2/2,+无穷大)

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若集合A={x|log(1/2)x≥1/2},则CRA=(1/2)是底数A,(-无穷大,0】∪(√2/2,+无穷大)B,(√2/2,+无穷大)C,(-无穷大,0∪【√2/2,+无穷大)D,【√2/2,

若集合A={x|log(1/2)x≥1/2},则CRA=(1/2)是底数A,(-无穷大,0】∪(√2/2,+无穷大)B,(√2/2,+无穷大)C,(-无穷大,0∪【√2/2,+无穷大)D,【√2/2,+无穷大)
若集合A={x|log(1/2)x≥1/2},则CRA=
(1/2)是底数
A,(-无穷大,0】∪(√2/2,+无穷大)B,(√2/2,+无穷大)C,(-无穷大,0∪【√2/2,+无穷大)D,【√2/2,+无穷大)

若集合A={x|log(1/2)x≥1/2},则CRA=(1/2)是底数A,(-无穷大,0】∪(√2/2,+无穷大)B,(√2/2,+无穷大)C,(-无穷大,0∪【√2/2,+无穷大)D,【√2/2,+无穷大)
log(1/2)x≥1/2解得0

AC一样。

选A