1 Group 6
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Question 1.
Vectors
u
,
v
of lengths
|
u
|
=
5
,
|
v
|
=
2
have the deviation
120
°
. Then
(
u
+
2
v
)
2
is equal to
a)
41
b)
61
c)
21
d)
41
+
20
3
e)
81
Question 2.
The straight lines
x
=
1
+
2
t
,
y
=
2
+
t
,
t
∈
ℝ
, and
x
=
-
4
s
,
y
=
3
-
2
s
,
s
∈
ℝ
, are
a)
skew lines
b)
intersecting at
[
2
,
1
]
c)
different parallels
d)
identical
e)
intersecting at
[
3
,
-
1
]
Question 3.
The distance of the point
A
=
[
3
,
1
,
-
4
]
from the straight line
X
=
[
1
,
-
6
,
-
3
]
+
t
(
2
,
4
,
3
)
,
t
∈
ℝ
is equal to
a)
3
b)
2
c)
1
d)
5
e)
4
Evaluate