Question

1.

a) Tìm ƯCLN(180,234)

b) Tìm ƯC( 180,234)

2.Tìm Ư(15)

( trình bày đẹp nha các bn )

Answer 1

a)

\(180=2^2.3^2.5\)

\(234=2.3^2.13\)

\(UCLN\left(180;234\right)=2.3^2=18\)

b)

\(180=2^2.3^2.5\)

\(234=2.3^2.13\)

\(BCNN\left(180;234\right)=2^2.3^2.5.13=2340\)

2)

\(U\left(15\right)=\left\{-1;1;-3;3;-5;5;-15;15\right\}\)

Answer 2

a) 18

b)1,2,3,6,9,18

c)1,3,5,15

Answer 3

jl