Question

不等式填空题一道

Answer 1

1/log2 x +2|>3/2

设1/og2 x=t

|t+2|>3/2

t+2>1.5 or t+2-0.5 or t-0.5

同*(log2 x)^2

log2 x>-0.5(log2 x)^2

log2 x(1+0.5log2 x)>0

log2 x>0 or log2 x1 or 0