1=10的几次方.例:0.1=10的-1次方,0.01=10的负二次方 1=2的几次方

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1=10的几次方.例:0.1=10的-1次方,0.01=10的负二次方 1=2的几次方

1=10的0次方.例:0.1=10的-1次方,0.01=10的负二次方 1=2的0次方