解不等式:log2x+log(1/2)(x-2)>1.2和1/2是底数!
问题描述:
解不等式:log2x+log(1/2)(x-2)>1.2和1/2是底数!
答
x-2>0,x>2
log2x+log(1/2)(x-2)>1
log(2)x+log(2)1/(x-2)>1
log(2)x/(x-2)>1
x/(x-2)>2
x>2x-4
x