3 years ago

Can you help me in this question

Mathematics

1 answer:

Andre45 [30]3 years ago

6 0

9514 1404 393

Answer:

the correct choice is marked

Step-by-step explanation:

The elements are 1, 4, {4}, {9}. That is, any subset that includes 1 must include it without braces. Any subset that includes 9 must include it with braces.

{4, {9}, 1} is a subset of A

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