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1.Aflati c.m.m.d.c.-ul si c.m.m.m.c.-ul pentru numerele de mai jos:
a) 18, 32, 64; b) 144, 320; c) 175, 200, 225; d) 576, 144; e) 169,195;

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Răspuns :

Răspuns:

a) 18=3^2*2

32=2^5

64=2^6

cmmdc=2

cmmmc=3^2*2^6=9*64=576

b) 144=2^4*3^2

320=2^6*5

cmmdc= 2^4=16

cmmmc=2^6*5*3^2=64*5*9=2880

c) 175=5^2*7

200=2^3*5^2

225=5^2*3^2

cmmdc=5^2=25

cmmmc=5^2*7*2^3*3^2=25*7*8*9=12600

d)576=2^6*3^2

144=2^4*3^2

cmmdc=2^4*3^2=16*9=144

cmmmc=2^6*3^2=576

e)169=13^2

195=5*3*13

cmmdc=13

cmmmc=5*3*13^2=15*169=2535

[tex]a)18 = 3 {}^{2} \times 2[/tex]

[tex]32 = 2 {}^{5} [/tex]

[tex]64 = 2 {}^{6} [/tex]

[tex]cmmdc = 2[/tex]

[tex]cmmmc = 3 {}^{2} \times 2 {}^{6} = 9 \times 64 = 576[/tex]

[tex]b)144 = 2 {}^{4} \times 3 {}^{2} [/tex]

[tex]320 = 2 {}^{6} \times 5[/tex]

[tex]cmmdc = 2 {}^{4} = 16[/tex]

[tex]cmmmc = {2}^{6} \times 5 \times 3 {}^{2} = 64 \times 5 \times 9 = 2880[/tex]

[tex]c)175 = 5 {}^{2} \times 7[/tex]

[tex]200 = {2}^{3} \times {5}^{2} [/tex]

[tex]225 = {5}^{2} \times {3}^{2} [/tex]

[tex]cmmdc = {5}^{2} = 25[/tex]

[tex]cmmmc = {5}^{2} \times 7 \times 2 {}^{3} \times {3}^{2} = 25 \times 7 \times 8 \times 9 = 12600[/tex]

[tex]d)576 = {2}^{6} \times {3}^{2} [/tex]

[tex]144 = 2 {}^{4} \times 3 {}^{2} [/tex]

[tex]cmmdc = 2 {}^{4} \times 3 {}^{2} = 16 \times 9 = 144[/tex]

[tex]cmmmc = 2 {}^{6} \times 3 {}^{2} = 576[/tex]

[tex]e)169 = {13}^{2} [/tex]

[tex]195 = 5 \times 3 \times 13[/tex]

[tex]cmmdc = 13[/tex]

[tex]cmmmc = 5 \times 3 \times {13}^{2} = 15 \times 169 = 2535[/tex]

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