mathmath333
  • mathmath333
True or False
Mathematics
chestercat
  • chestercat
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mathmath333
  • mathmath333
\(\ \{ a \}∈ \{ a, b, c \}\)
anonymous
  • anonymous
false
mathmath333
  • mathmath333
why

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anonymous
  • anonymous
false, because the set with a is not element of {a,b,c}
anonymous
  • anonymous
{{a},b,c} is diferente of {a,b,c}
anonymous
  • anonymous
\[\{a\} \in \{\{a\},b,c\}\]
mathmath333
  • mathmath333
if the question was \(\{a\} \in \{\{a\},b,c\} \) , then ?
anonymous
  • anonymous
{a} is a element of { {a} .... } {a} diferent mean of 'a' only the sets {a,b,c} is diferent of {{a},b,c} elements of {a,b,c} are a, b, c elements of {{a},b,c} are {a}, b, c
anonymous
  • anonymous
a in {a,b,c}, {a} not in {a,b,c}
mathmath333
  • mathmath333
this is confusang me
anonymous
  • anonymous
this is only definition thinks, and notation a is diferente of set of a \[a \neq \{a\}\]
anonymous
  • anonymous
1 pen and a package with one pen have diferent mean
anonymous
  • anonymous
a package with a, b, c is { a, b, c } a package with a package with a, b, c is { {a}, b, c}
mathmath333
  • mathmath333
is my second question true or falswa ?
anonymous
  • anonymous
{a}∈{a,b,c} is false, {a} is not element of {a,b,c}
anonymous
  • anonymous
if the question was {a}∈{{a},b,c} , is true, because {a} is element of {{a},b,c}

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