Question

1.计算a的绝对值分之a减a分之a的绝对值( a小于0)

Answer 1

1.a/(|a|)-(|a|)/a

= a/(-a)-(-a)/a

= -1-(-1)

= 0

2..|3-∏|= ∏-3

3.|A-2|-3

当A>2时,原式=A-2-3=A-5

当0