更新1:
I mean What are the subsets of Ø ?
Write all the subsets of phi .?
回答 (2)
2015-09-12 3:09 pm
What are you using phi for ? It can stand for many different numbers, or sets. If you are using it to stand for a number, then I don't understand how a number can have subsets.
Often, phi stands for the golden ratio = 1.618039887...
Often, phi stands for the golden ratio = 1.618039887...
2015-09-12 3:13 pm
Supposing you mean {p, h, i} and you want all the subsets, they are
{p, h, i},
{p, h},
{h, i},
{p, i},
{p},
{h},
{i},
Ø
The last one listed, namely Ø, denotes the empty set, which, if you prefer, could be written {}.
{p, h, i},
{p, h},
{h, i},
{p, i},
{p},
{h},
{i},
Ø
The last one listed, namely Ø, denotes the empty set, which, if you prefer, could be written {}.
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原文連結 [永久失效]:
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