Question

6,7,8 si 9 plssss.......​

Answer 1

Răspuns:

Buna sper ca e bine! Spune mi daca mai ai nevoie de alte exercitii!!

Answer 2

6. A={n∈N*| n≤3}

A={1,2,3}

B={n∈N*| 2ⁿ≤8}

B={1,2,3}

A=B

7. A={x∈Z| -3<x+5≤3}

-3<x+5≤3 /-5

-8<x≤ -2

A={-7,-6,-5,-4,-3,-2}

B={x∈Z| -6≤x<-2}

B={-6,-5,-4,-3}

a. -5∈A(A)

b. A⊂B(F)

c. ∅⊂B(A)

d. {-1,0,1}⊂A(F)

8. a. A⊃B

b. B⊂A

c. C⊂E

d. B⊄D

9. {2;3;x;9}={2;3;7;9}

x=7