解不等式log1/2(x^2-2x-3)≥1/32

题目

解不等式log1/2(x^2-2x-3)≥1/32

答案

log1/2(x^2-2x-3)≥1/32 =(1/2)^5
log1/2[log1/2(x^2-2x-3)]≤log1/2(1/2)^5
x^2-2x-3≤5
x≥4 或x≤-2