lg1/25减lg4等于多少

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lg1/25减lg4等于多少
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lg1/25减lg4等于多少
lg1/25减lg4等于多少

lg1/25减lg4等于多少
lg1/25-lg4=lg(1/25 ÷4)=lg1/100=-lg100= -2

lg1/4-lg25 =lg(1/4÷25) =lg(1/100) =lg(10^-2) =-2 lg1/4-lg25 =lg4^(-1)-lg25 =-lg4-lg25 =-(lg4+lg25) =-lg(4*