求值1/5(lg32+log4 16+6lg1/2)+1/5lg1/5

问题描述:

求值1/5(lg32+log4 16+6lg1/2)+1/5lg1/5

1/5(lg32+log4 16+6lg1/2)+1/5lg1/5
=1/5(lg32+2+6lg1/2)+1/5lg1/5
=1/5(2+lg1/2)+1/5lg1/5
=1/5(lg100+lg1/2)+1/5lg1/5
=1/5lg50+1/5lg1/5
=1/5乘1
=1/5