解不等式 log1/2(3x2-2x-5)≤log1/2(4x2 x-5)
问题描述:
解不等式 log1/2(3x2-2x-5)≤log1/2(4x2 x-5)
答
log1/2(3x2-2x-5)≤log1/2(4x2 +x-5)
∴3x2-2x-5>=4x2+x-5且3x2-2x-5>0,4x2+ x-5>0
解得-3