Question

A={x : x is an odd natural number < 8} B={x : x is a natural number ,3 < x < 8}then write (a) A and B in roster form​

Answer 1

Answer:

A = {1,3,5,7}

B = {4,5,6,7}

Step-by-step explanation:

An odd number in the form of

2n-1 where n is natural number

So we need all the 2n-1 < 8

lets find some,

for n = 1, 2(1)-1 < 8

1 < 8

So, 1 is one of our odd.

Similarly for others n.

3 < x < 8 means (x > 3 and x < 8)