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Лезгинка11
@Лезгинка11
November 2021
1
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#260 помогите подалуйста
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piksaeva85znayka
1) А={11,22,33,44,55,66,77,88,99}
2) n(A)=9
3)
a){33,55,77}∈А
б) {43,53}∉ A
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Answers & Comments
2) n(A)=9
3)
a){33,55,77}∈А
б) {43,53}∉ A