Պարապմունք 5․հանրահաշիվ

A-{7,14,21,28,35,42,49,56,63,70,77,84,91,98}

B-{5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95}

A∩B={35, 70}

A∪B={1,-1,0,2/3,7,0,-1,2/3,5/8}

A∩B={0,-1, 2/3}

A-ում կան-1

ա={1}∩{1}=1

բ={4,1,3}∩{2,3,5}={3}

ա) a = 8

բ) a = 4

գ)a = 8, b = 2

դ) a = 7,

|A∪B| = |A| + |B| - |A∩B|

13 = 4 + |B| - 3

13 = 1 + |B|

|B| = 13 - 1 = 12

A-{3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48}

B

{5, 10, 15, 20, 25, 30, 35, 40, 45}

A \cap B - {15, 30, 45}

A

∪

B

{3, 5, 6, 9, 10, 12, 15, 18, 20, 21, 24, 25, 27, 30, 33, 35, 36, 39, 40, 42, 45, 48}

$6, 12, 18, 24, 30, 36, 42, 48$

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