log64 1/2=x logx 625=4/3 log1000 X=-2/3 log81 1/27=x logx 8=3/5

问题描述:

log64 1/2=x logx 625=4/3 log1000 X=-2/3 log81 1/27=x logx 8=3/5

log64 1/2=x
64^x=1/2
2^6x=2^-1
6x=-1
x=-1/6
logx 625=4/3
x^(4/3)=625
x=625^(3/4)
x=125
log1000 X=-2/3
x=1000^(-2/3)
x= 0.01
log81 1/27=x
81^x=1/27
3^4x=3^-3
4x=-3
x=-3/4
logx 8=3/5
x^(3/5)=8
x=8^(5/3)
x=32