|2×-1|caranya dijadikan definisi mutlak

|2x-1| = 0
2x-1 >= 0
2x >= 0+1
2x >= 1
x >= 1/2
dan
-(2x-1) < 0
-2x+1 < 0
-2x < 0-1
-2x < -1
x < -1/-2
x < 1/2

syarat x >= 1/2
2x-1= 0
2x = 1
x = 1/2(M)
syarat x < 1/2
2x-1=0
2x=0+1
2x=1
x=1/2(TM)

HP= { 1/2 }