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Question

Mathematics Question on Sets

Let A=1,  2 a,  b,  3,  4,A=\\{1,\,\,2\,\\{a,\,\,b\\},\,\,3,\,\,4\\}, which among the following statements is incorrect?

A

a, b⊂A\\{a,\,b\\}\subset A

B

a, b∈A\\{a,\,b\\}\in A

C

a, b⊂A\\{\\{a,\,b\\}\\}\subset A

D

1, 2⊂A\\{\\{1,\,2\\}\\}\subset A

Answer

a, b⊂A\\{\\{a,\,b\\}\\}\subset A

Explanation

Solution

Given, A=1,3,a,b,3,4A=\\{1,3,\\{a,b\\},3,4\\} then incorrect statement is a,b⊂A\\{a,b\\}\subset A