## mathmath333 one year ago True or False

1. mathmath333

$$\ \{ a \}∈ \{ a, b, c \}$$

2. anonymous

false

3. mathmath333

why

4. anonymous

false, because the set with a is not element of {a,b,c}

5. anonymous

{{a},b,c} is diferente of {a,b,c}

6. anonymous

$\{a\} \in \{\{a\},b,c\}$

7. mathmath333

if the question was $$\{a\} \in \{\{a\},b,c\}$$ , then ?

8. 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

9. anonymous

a in {a,b,c}, {a} not in {a,b,c}

10. mathmath333

this is confusang me

11. anonymous

this is only definition thinks, and notation a is diferente of set of a $a \neq \{a\}$

12. anonymous

1 pen and a package with one pen have diferent mean

13. anonymous

a package with a, b, c is { a, b, c } a package with a package with a, b, c is { {a}, b, c}

14. mathmath333

is my second question true or falswa ?

15. anonymous

{a}∈{a,b,c} is false, {a} is not element of {a,b,c}

16. anonymous

if the question was {a}∈{{a},b,c} , is true, because {a} is element of {{a},b,c}