高一数 怎么算。要有过程
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=lg(16/125)^0.5 + lg 125/3*8^0.5 + lg3/5
=lg ((16/125)^0.5) * (125/3*8^0.5 ) * (3/5)
=lg(16^0.5 *125 *3)/(125^0.5 * 3 *8^0.5 * 5 )
=lg(16^0.5 *125^0.5 )/(8^0.5 * 5 )
=lg(16^0.5 *5*5^0.5 )/(8^0.5 * 5 )
=lg(16^0.5 *5^0.5 )/(8^0.5)
=lg(2^0.5 *5^0.5 )
=lg(10^0.5 )
=0.5
=lg ((16/125)^0.5) * (125/3*8^0.5 ) * (3/5)
=lg(16^0.5 *125 *3)/(125^0.5 * 3 *8^0.5 * 5 )
=lg(16^0.5 *125^0.5 )/(8^0.5 * 5 )
=lg(16^0.5 *5*5^0.5 )/(8^0.5 * 5 )
=lg(16^0.5 *5^0.5 )/(8^0.5)
=lg(2^0.5 *5^0.5 )
=lg(10^0.5 )
=0.5
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