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Răspuns :

a)

x=0 => 70

x=2 =>  72

x=4 => 74

x=6 => 76

x=8 => 78

b)

7+x=M₃ => M₃={3;6;9;12;15;18;21;....}

x=2 => 72

x=5 => 75

x=8 => 78

c)

x=0 => 70

x=5 => 75

d)

7+x=M₉ => M₉={9;18;27;36;....}

x=2 => 72

e)

x=0 => 70

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