Question

1.当a≥大于等于4时,求根号(4-a)平方

Answer 1

1:无实解

2:无实解

3:正负3

4:0.042 0.134 0.42 1.34 4.2 13.4 42 134 根号下100x=10倍根号x 根号下0.01x=0.1倍根号x