Question

Tentukan nilai x dari | x-1 | = 7

Answer 1

|x - 1| = 7

kondisi 1: x > 0
(x - 1) = 7
x = 8

kondisi 2: x < 0
- (x - 1) = 7
- x + 1 = 7
- x = 6
x = - 6

Answer 2

| x-1 | =7 -> x-1= -7 atau x-1= 7
x= -8 x= 6
himpunan penyelesaian {-8,6}