Question

Aflati cardinalul urmatoarelor multimi:

Answer 1

Cardinalul unei multimi reprezinta numarul de elemente ale multimii respective

a)

A={-1,0,1,2,3,4}

cardA=6

b)

n∈N*

n<21

n={1,2,3,...,20}

20-1+1=20 elemente

cardB=20

c)

n|24

n={1,2,3,4,6,8,12,24}

cardC=8

d)

n=2k

adica n este par

n<15

n={0,2,4,6,8,10,12,14}

cardD=8

e)

(3×4)×2+3n≤291

24+3n≤291

3n≤267

n≤89

n={0,1,2,3,...,89}

89-0+1=90 elemente

cardE=90

Un alt exercitiu gasesti aici: https://brainly.ro/tema/779372

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