11.16 Answers to reinforcement exercises
1.(i) (ii)a (^) − c
(iii)
a^ +
2 b
(iv)
a
(v)
(a (^) −
(^) b)
23
(a^ +^
b)
(^12)
a^ +^ b
(vi)
a − 2
c
b
b
b
b
a
a
a
a
a
c
c
2.(i)x=
3
4
a−
3
2
b (ii)x=
1
2
a−
1
2
b (iii)x=
1
3
b+
1
2
c
3.(± 1 , 0 , 0 );( 0 ,± 1 , 0 );( 0 , 0 ,± 1 )
4.
y
z
x
0
(0,0,2)
(1,−2,2)
(3,0,0)
(2,0,1)
(0,−1,0)
(−2,1,0)
(1,1,1)
(1,1,0)
(−2,1,−1)
(0,1,1)