Question

a与b互为相反数,c与D互为倒数,m的绝对值是2,求式子m的平方分之a加b减cd加m的值 a加b是绝对值m也是

Answer 1

1.

a+b=0

c*d=1

|m|=2

|a+b|/m²-cd+|m|

=0-1+2

=1

2.

1)mn在原点两侧

距离为:5又1/2+2=7又1/2

2)mn在原点同侧

距离为:5又1/2-2=3又1/2

3.

-1-(-5/12)-[(-7/8)+(-3/4)]

=-1+5/12-(-13/8)

=-7/12+13/8

=-14/24+39/24

=25/24