a) Ta có :
9 = 32
81 = 34
=> ƯCLN ( 9 ; 81 ) = 32 = 9
b) Ta có :
11 = 11
15 = 3 . 5
=> ƯCLN ( 11 ; 15 ) = 1
c) Ta có :
10 = 2 . 5
1 = 1
=> ƯCLN ( 1 ; 10 ) = 1
d) Ta có :
150 = 2 . 3 . 52
84 = 22 . 3 . 7
=> ƯCLN ( 150 ; 84 ) = 2 . 3 = 6
a, ƯCLN (9,81)= {1,3,9}
b, ƯCLN (11,15)={1}
c, ƯCLN (1,10)= {1}
d, ƯCLN (150,84)={1,2,3,6}
a,
Ta có:
9 = 32
81 = 34
\(\RightarrowƯCLN\left(9;81\right)=3^2=9\)
b)
Ta có:
\(11=1.11\)
\(15=1.15\)
\(\RightarrowƯCLN\left(11;15\right)=1\)
c)
Ta có:
\(1=1.1\)
\(10=1.10\)
\(\RightarrowƯCLN\left(1;10\right)=1\)
d)
Ta có:
\(150=2.3.5^2\)
\(84=2^2.3.7\)
\(\RightarrowƯCLN\left(150;84\right)=2.3=6\)
Ôi chết! Lộn rồi! Xin lỗi nha!
