Question

已知ab不等于0,求a的绝对值/a+b的绝对值/b+ab的绝对值/ab的值

Answer 1

a > 0,b > 0时,

|a|/a + |b|/b + |ab|/ab = 1 + 1 + 1 = 3

a > 0,b < 0时,

|a|/a + |b|/b + |ab|/ab = 1 - 1 - 1 = -1

a < 0,b > 0时,

|a|/a + |b|/b + |ab|/ab = -1 + 1 - 1 = -1

a < 0,b < 0时,

|a|/a + |b|/b + |ab|/ab = -1 - 1 + 1 = -1