Question

Sir in the following question we have to answer true or false..

A={1,2,{3,4},5}

1-- fi € A

2 fi subset of A

3 {fi} is a subset of A

Please help sir

Thank you

Answer 1

I assume that Φ mentioned in your question is the null set.

1)False
An element of the set is one of the things in the set.The empty set is not an element of (1,2,(3,4),5).
Instead it is the set that doesn't not contain any elements

2)True
Null set is a subset of every set.

3)True
The notation (Φ) becomes different.It is a set that contains an empty set. But still it doesn't contain any element.. So it is also a subset.