log1/2(x²-2x-3)>=1/32,

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log1/2(x²-2x-3)>=1/32,log1/2(x²-2x-3)>=1/32,log1/2(x²-2x-3)>=1/32,即log1/2(x²-2x-

log1/2(x²-2x-3)>=1/32,
log1/2(x²-2x-3)>=1/32,

log1/2(x²-2x-3)>=1/32,
即log1/2 (x²-2x-3)>=log1/2 (5)=1/32
因为底数是1/2 即x²-2x-3