Question

Tim Uc cua 13 va. 20

Answer 1

Ta có:

13=13

20=2^2*5

ƯCLN(13,20)=1

ƯC(13,20)=Ư(1)=1

Answer 2

Ta có: 13= 13

           20= 2²

^{=> ƯCLN(13,20)=1}

^{Vậy ƯC(13,20)=1}

Answer 3

Ta có:

13=13

20=2²\(\times\)5

\(\Leftrightarrow\)ƯCLN(13;20)=1

\(\Leftrightarrow\)ƯCLN(13;20)=1