关于对数的计算题一.计算(1).lg1/4-lg25(2).2log5 10+log5 0.25二.已知lg2=0.3010,lg3=0.4771,求下列各对数的值(精确到小数点后第四位)(1).lg√3(2)lg3/2三.已知x的对数,求xloga x=1/2loga b-loga c
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![关于对数的计算题一.计算(1).lg1/4-lg25(2).2log5 10+log5 0.25二.已知lg2=0.3010,lg3=0.4771,求下列各对数的值(精确到小数点后第四位)(1).lg√3(2)lg3/2三.已知x的对数,求xloga x=1/2loga b-loga c](/uploads/image/z/1247756-68-6.jpg?t=%E5%85%B3%E4%BA%8E%E5%AF%B9%E6%95%B0%E7%9A%84%E8%AE%A1%E7%AE%97%E9%A2%98%E4%B8%80.%E8%AE%A1%E7%AE%97%281%29.lg1%2F4-lg25%282%29.2log5+10%2Blog5+0.25%E4%BA%8C.%E5%B7%B2%E7%9F%A5lg2%3D0.3010%2Clg3%3D0.4771%2C%E6%B1%82%E4%B8%8B%E5%88%97%E5%90%84%E5%AF%B9%E6%95%B0%E7%9A%84%E5%80%BC%EF%BC%88%E7%B2%BE%E7%A1%AE%E5%88%B0%E5%B0%8F%E6%95%B0%E7%82%B9%E5%90%8E%E7%AC%AC%E5%9B%9B%E4%BD%8D%EF%BC%89%281%29.lg%E2%88%9A3%282%29lg3%2F2%E4%B8%89.%E5%B7%B2%E7%9F%A5x%E7%9A%84%E5%AF%B9%E6%95%B0%2C%E6%B1%82xloga+x%3D1%2F2loga+b-loga+c)
关于对数的计算题一.计算(1).lg1/4-lg25(2).2log5 10+log5 0.25二.已知lg2=0.3010,lg3=0.4771,求下列各对数的值(精确到小数点后第四位)(1).lg√3(2)lg3/2三.已知x的对数,求xloga x=1/2loga b-loga c
关于对数的计算题
一.计算
(1).lg1/4-lg25
(2).2log5 10+log5 0.25
二.已知lg2=0.3010,lg3=0.4771,求下列各对数的值(精确到小数点后第四位)
(1).lg√3
(2)lg3/2
三.已知x的对数,求x
loga x=1/2loga b-loga c
关于对数的计算题一.计算(1).lg1/4-lg25(2).2log5 10+log5 0.25二.已知lg2=0.3010,lg3=0.4771,求下列各对数的值(精确到小数点后第四位)(1).lg√3(2)lg3/2三.已知x的对数,求xloga x=1/2loga b-loga c
lg1/4-lg25
=lg(1/4)/25
=lg1/100
=-2
2log5 10+log5 0.25
=log5 10^2+log5 0.25
=log5 100+log5 0.25
=log5 100*0.25
=log5 25
=2
lg√3
=lg3^(1/2)
=(1/2)*lg3
=0.4771/2
=0.2386
lg3/2=lg3-lg2
=0.4771-0.3010
=0.1761
loga x=1/2loga b-loga c
loga x=loga b^(1/2)-loga c
loga x=loga b^(1/2)/c
x=b^(1/2)/c