1.|1/2x|+2=6 3.|3-2x|4 5.|2x-1/5|1/2 7.1
问题描述:
1.|1/2x|+2=6 3.|3-2x|4 5.|2x-1/5|1/2 7.1
答
1.|1/2x|+2=>-3=>-1/6
答案是
-6
=>3x>8,3x=>x>8/3,x 3.|3-2x|=>-3=>-6=>04.|2x-3|>4
=>2x-3>4,2x-3=>2x>7,2x=>x>7/2,x5.|2x-1/5|-1/3-2/15-1/15 6.|1/2+3|>1/2
没有x
7.1=>2x-1>1,2x-1=>x>1,x=>-1