Question

please give me answer​

Answer 1

Step-by-step explanation:

i. Z={ x| 9x -7 =0 ,x€ N}

9x-7=0

=> 9x=7

=> x=7/9 not a natural number.

So Z has no element.

So Z is an empty set.

ii.D={x|x²=1,x>0}

x²=1

=> x=±1

As x>0 , so x=1

So D is a singleton set.

iii. P={a|a is a natural number less than 0}

As there is no natural number which is

less than 0.

So P has no element.

Thus P is an empty set.

hope it will help you.