9.已知log(2在log的右下角)x=3,则x^-1/2=( )9.已知log(2在log的右下角)x=3,则x^-1/2=( )

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9.已知log(2在log的右下角)x=3,则x^-1/2=( )9.已知log(2在log的右下角)x=3,则x^-1/2=(    )

9.已知log(2在log的右下角)x=3,则x^-1/2=( )9.已知log(2在log的右下角)x=3,则x^-1/2=( )
9.已知log(2在log的右下角)x=3,则x^-1/2=( )
9.已知log(2在log的右下角)x=3,则x^-1/2=( )

9.已知log(2在log的右下角)x=3,则x^-1/2=( )9.已知log(2在log的右下角)x=3,则x^-1/2=( )
由log2 x=3 得X=8,所以x^-1/2=127/2