1.
The arithmetic square root of is (
)
A.4
B.iv.
C.2
D.2
2. if a‖b,
British Columbia,
D⊥a, and then (
A.b⊥d
B.a⊥c
c . b . d
Washington D.C.
3. As shown in the figure, simplify:-
+|b+a- 1|(
A. 1
B. 1-2b-2a
C.2a-2b+ 1
D.2a+2b- 1