Chapter 17: Class 9 Math Exam Tests

Class 9 Math MCQs - Chapter 17

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*In z = a + bι, if i is replaced by −ι, then another complex number obtained is said to b*

- additive inverse of z
- prime factor of z
- Complex conjugate of z
- multiplicative inverse of z

c

*The set of whole numbers is denoted by*

- O
- N
- W
- P

c

*As per properties of real numbers with respect to addition, a + b ∈ R and ∀ a, b ∈ R is*

- associative property
- commutative property
- closure property
- additive inverse

c

*Set of integers is denoted by*

- N
- W
- A
- Z

d

*√−1, √−5 are said to be*

- pure imaginary numbers
- non-imaginary numbers
- recurring decimal numbers
- finite numbers

a

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