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Check whether the following sets are equ...

Check whether the following sets are equal ?
(i) A = {The set of the first five elements of the periodic table}
`B={H, He, Li, Be, B}`
(ii) C = {x : x is a prime number}
D = {x : x is an odd number}

Text Solution

Verified by Experts

The correct Answer is:
A and B
(a) A is the set of the first elements of periodic table.
`A={H, He, Li, Be, B}`
`B={H, He, Li, Be, B}`
`:. A` and `B` are equal sets.
(b) `C={x : x" is prime number"}`
`D={x : x" is odd number"}`
`C={2, 3, 5, 7, 11, ...}`
`D={3, 5, 7, 9, ...}`
`2 in C` but `2 in D`
`:. C` and `D` are not equal sets.
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