Question

Q.10 a) which of the following are examples of the null set
i) Set of odd natural numbers divisible by 2.
ii) (x:x is a natural numbers, x<5 and x>7
b) Write the following set in the set builder form:
i) 3,6,9,12
ii) (5.25, 125, 625)

4 mark question​

Answer 1

Answer:

1) is a null set

2( is a null set. { it is not possible that x is smaller than five or bigger than 7}

3) { x:x is a first four multiple of three}

4) x: x is a natural number. n^ , 1≥ x>6

Answer 2

a

Set of odd natural numbers divisible by 2 is a null set and (x:x is a natural numbers, x<5 and x>7) is also a null set.

b

i. (x:x is a natural no x<=12 and divisible by 3)

ii. (x:x is a natural no. 5 ki power x where x <=4

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