Matematică, întrebare adresată de flaviam2006pd4uie, 8 ani în urmă

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Răspunsuri la întrebare

Răspuns de 19999991
1
A=\left \{ 0,1,2,3,4,5\right \}

a)B=\left \{ x\:|\:x=a+3\: \: si \: \:a\:\in\:\mathbb{A}\right \}

x = a + 3

pt. \: a = 0 = > x = 0 + 3 = 3

pt. \: a = 1 = > x = 1 + 3 = 4

pt. \: a = 2 = > x = 2 + 3 = 5

pt. \: a = 3= > x = 3 + 3 = 6

pt. \: a= 4 = > x = 4 + 3 = 7

pt. \: a = 5 = > x = 5 + 3 = 8

 = > B=\left \{ 3,4,5,6,7,8 \right \}

b)C=\left \{ y\:|\:y=3^{a}-1\:si\:a\:\in\:\mathbb{A}\right \}

y = {3}^{a} - 1

pt. \: a = 0 = > y = {3}^{0} - 1 = 1 - 1 = 0

pt. \: a = 1 = > y = {3}^{1} - 1 = 3 - 1 = 2

pt. \: a = 2 = > y = {3}^{2} - 1 = 9 - 1 = 8

pt. \: a = 3 = > y={3}^{3} - 1 = 27 - 1 = 26

pt. \: a = 4 = > y = {3}^{4} - 1 = 81 - 1 = 80

pt. \: a = 5 = > y = {3}^{5} - 1 = 243 - 1 = 242

 = > C=\left \{ 0,2,8,26,80,242\right \}

c)D=\left \{ x\:|\:x =\overline{5a}\: \: si \: \:a\:\in\:\mathbb{A}\right \}

pt. \: a = 0 = > x = 50

pt. \: a = 1 = > x = 51

pt. \: a = 2 = > x = 52

pt. \: a = 3 = > x = 53

pt. \: a = 4 = > x = 54

pt. \: a = 5 = > x = 55

 = > D=\left \{ 50,51,52,53,54,55 \right \}

d)E=\left \{ y\:|\:y =3^{a}-2^{a} \: \:si \: \:a\:\in\:\mathbb{A}\right \}

y = {3}^{a} - {2}^{a}

pt. \: a = 0 = > y = {3}^{0} - {2}^{0} = 1 - 1 = 0

pt. \: a = 1 = > y={3}^{1} - {2}^{1} = 3 - 2 = 1

pt. \: a = 2 = > y={3}^{2} - {2}^{2} = 9 - 4 = 5

pt. \: a = 3 = > y = {3}^{3} - {2}^{3} = 27 - 8 = 19

pt. \: a = 4 = > y={3}^{4} - {2}^{4} = 81 - 16 = 65

pt. \: a = 5 = > y = {3}^{5} - {2}^{5} = 243 - 32 = 211

 = > E=\left \{ 0,1,5,19,65,211 \right \}

e)F=\left \{ x\:|\:x =\overline{aa}\: \: si \: \:a\:\in\:\mathbb{A}\right \}

x = \overline{aa}

pt. \: a = 0 = > x \: nu \: exista

pt. \: a = 1 = > x = 11

pt. \: a = 2 = > x = 22

pt. \: a = 3 = > x = 33

pt. \: a = 4= > x = 44

pt. \: a = 5 = > x = 55

 = > F=\left \{ 11,22,33,44,55 \right \}

f)G=\left \{ x\:|\:x =2a^{2}-2\: \: si \: \:a\:\in\:\mathbb{A}\right \}

x = 2 {a}^{2} - 2

pt. \: a = 0 = > x = 2 \times {0}^{2} - 2 = 2 \times 0 - 2 = 0 - 2 = - 2

pt. \: a = 1 = > x = 2 \times {1}^{2} - 2 = 2 \times 1 - 2 = 2 - 2 = 0

pt. \: a = 2 = > x=2 \times {2}^{2} - 2 = 2 \times 4 - 2 = 8 - 2 = 6

pt. \: a = 3 = > x = 2 \times {3}^{2} - 2 = 2 \times 9 - 2 = 18 - 2 = 16

pt. \: a = 4 = > x=2 \times {4}^{2} - 2 = 2 \times 16 - 2 = 32 - 2 = 30

pt. \: a = 5 = > x = 2 \times {5}^{2} - 2 = 2 \times 25 - 2 = 50 - 2 = 48

 = > G=\left \{ -2,0,6,16,30,48\right \}
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