(lgx+1)/(2lgx-3)

题目详情

(lgx+1)/(2lgx-3)

▼优质解答

答案和解析

(lgx+1)/(2lgx-3)-1<0
(lgx+1-2lgx+3)/(2lgx-3)<0
(-lgx+4)/(2lgx-3)<0
所以 (-lgx+4)(2lgx-3)<0
(lgx-4)(2lgx-3)>0
lgx<3/2,lgx>4
所以x<10^(3/2),x>10^4
真数大于0
所以010000

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