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Math 12 Chapter 7
Vectors
Test - 6
1.
k . k
a) k
b) 1
c) x
d) i
2.
(6i - 2j + 5k).( 2i - 4j + 7k)
a) 2
b) 4
c) 8
d) 6
3.
x. y. = 0
a) x
b) -1
c) y
d) 1
4.
I2i - 3j + 6kI
a) -7
b) 7
c) 6
d) 5
5.
(3i+mj-2k).(2i-4j-7k) = 0
a) m5
b) m/5
c) m = 5
d) m-5
6.
(2i - j) . (3i + k)
a) 8
b) 6
c) 9
d) 4
7.
I x j
a) x
b) k
c) s
d) a
8.
(4i-5j-2k) . (-i+2j+4k) x (5i+2j+3k)
a) 99
b) 100
c) 75
d) 50
9.
(2i-5j+k) . (3i+2j+2k) x(2i-j+ak) = 0
a) k = 23/19
b) a = 23/19
c) i = 23/19
d) j = 23/19
10.
(2i - j - k) . (3i + 2j - 5k)
a) 30
b) 20
c) 10
d) Work done = 9
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