Question

Tìm : ƯCLN , BCNN , ƯC , BC :

a , 78 và 39

b, 125 và 35

ai nhanh like

Answer 1

a) 78=2.3.13

   39=3.13

ƯCLN(78,39)=3X13=39;ƯC(78,39)=39;BCNN(78,39)=78;BC(78,39)=78

B)125=5^3

    35=5.7

UCLN(125,35)=5;ƯC(125;35)=5;BCNN(125,25)=875;BC(125;25)=875

Answer 2

a)

UCLN(78,39) = 39 (vì 78 chia hết cho 39)

=> ƯC(78,39) = Ư(39) = {1;3;13;39}

BCNN(78,39) = 78 (vì 78 chia hết cho 39)

=> BC(78,39) = B(78) = {0;78;156;...}

b)

125 = 5³

35 = 5 x 7

=> UCLN(125,35) = 5

=> ƯC(125,35) = Ư(5) = {1;5}

=> BCNN(125,35) = 5³ x 7 = 875

=> BC(125,35) = B(875 = {0;875;1750;...}

Answer 3

a)ƯCLN(78;39)=39

ƯC(78;39)=Ư(39)={1;3;13;39}

BCNN(78;39)=78

BC(78;39)=B(78)={0;78;156;234;...}

b)ƯCLN(125;35)=5

ƯC(125;35)=Ư(5)={1;5}

BCNN(125;35)=875

BC(125;35)=B(875)={0;875;1750;2625;...}