Leonardo
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### Questions (33)

 6 Is the set $\{1\}$ a member, and not a subset of the power set of $\{1, 2\}$? 6 The author of my book simplifies his solutions to an extent that I am uncomfortable with, so are my solutions to homework over doing it? 4 How do I show that two sets are equal. 4 How might one go about proving this poorly worded theorem about divisibility with the number 3? 3 For every set A, the empty set is a subset of A. The empty set is a set. Therefore, the empty set has a cardinality >= 1..

### Reputation (500)

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 3 Place of functions in order of operations? 0 Help with Geometry (sphere) question

### Tags (29)

 3 functions × 3 0 elementary-number-theory × 3 3 arithmetic 0 geometry × 3 0 proof-writing × 7 0 relations × 3 0 algebra-precalculus × 5 0 multivariable-calculus × 2 0 elementary-set-theory × 5 0 problem-solving × 2

### Accounts (34)

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