Considere as seguintes afirmações sobre o conjunto U = {0,1,2,3,4,5,6,7,8,9}:

I) ∅ ∈ U e n(U) = 10.

II) ∅ ⊂ U e n(U) = 10.

III) 5 ∈ U e {5} ⊂ U.

IV) {0,1,2,5} ∩ {5} = 5.

Pode-se dizer, então, que é(são) verdadeira(s):

a) apenas I e III.

b) apenas II e IV.

c) apenas II e III.

d) apenas IV.

e) todas as afirmações.

Step-by-step explanation:

Given that the set U = {0,1,2,3,4,5,6,7,8,9}

Given statements are I) ∅ ∈ U and n (U) = 10.

II) ∅ ⊂ U and n (U) = 10.  

III) 5 ∈ U and {5} ⊂ U.  

IV) {0,1,2,5} ∩ {5} = 5.

A universal set is the collection of all elements in a particular manner.

All other sets are subsets of the universal set, the universal set  is denoted by  U.

Hence I) ∅ ∈ U and n (U) = 10.

II) ∅ ⊂ U and n (U) = 10.  

III) 5 ∈ U and {5} ⊂ U.  

IV) {0,1,2,5} ∩ {5} = 5.  are all true by the definition of Universal set.

ha!

i just did this!

18. g

20. h 30 degree turn.

21. d 90 degree angles

and also 19 is a. a sphere not a cirlcle

hope i !

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