log2(0.5)=(?)、log4(0.5)=(?)、-log2(0.5)=(?)、log2(4)=(?)_数学解答

log2(0.5)=(?)、log4(0.5)=(?)、-log2(0.5)=(?)、log2(4)=(?)

人气：282 ℃　时间：2020-02-15 08:48:50

解答

log2(0.5)=log2(1/2)=log2{2ˆ(-1)}=-1
log4(0.5)=log2²(0.5)=1/2log2(0.5)=-1/2
-log2(0.5)=1
log2(4)=log2(2²)=2