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Math 11 Chapter 2
Number System
Test - 9
1.
ί in polar form can be written as…………
a) (Cos π/2 + i sin π/2)
b) Cos π + i sin π
c) None
d) Cos (-π/2) + i sin (-π/2)
2.
If 1/x =x for all x E R, then value of x is?
a) None of the given
b) 2
c) 0
d) ± 1
3.
Simplify (5, -4) ÷ (-3, -8)?
a) (14/71, 51/71)
b) (17/73 , 52/73)
c) (15/73 , 52 /73)
d) (19/71 , 51/71)
4.
In an equation 2x =3, there is a solution in the set of integers.
a) True
b) False
5.
Q
Ç
Q' = Θ
a) False
b) True
6.
x + i y
a) r (cosΘ - i sinΘ)
b) r (cosΘ -+ i sinΘ)
c) r (cosΘ + i sinΘ)
7.
If x is not a perfect square then
√
x
=……………
a) Retinol number
b) None of these
c) Irrational number
d) Prime number
8.
Write as a simple complex number (-2+3i)2 / 1+i?
a) -17/2+7/2i
b) -17/2 -7/2i
c) 17/2+7/2i
d) 17/2 - 7/1 i
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