Question

tìm ƯC qua thông tin tìm ƯCLN

Answer 1

e) \(10=5.2;20=2^2.5;70=2.5.7=>ƯCLN\left(10;20;70\right)=2.5=10\)
\(=>ƯC=\left\{2;5;10\right\}\)
f) \(25=5^2;55=11.5;75=3.5^2=>ƯCLN\left(25;55;75\right)=5\)
\(=>ƯC=\left\{5\right\}\)

Answer 2

e, ƯC (10) = { 2; 5; 10 }

    ƯC ( 20 ) = { 2; 4; 5; 10; 20 }

    ƯC ( 70 ) = { 2; 5; 7; 10; 14; 35; 70 }

=> ƯCLN ( 10; 20; 70 ) = 10

f, ƯC ( 25 ) = { 5; 25 }

   ƯC ( 55 ) = { 5; 11; 55 }

   ƯC ( 75 ) = { 3; 5; 15; 25; 75 }

=> ƯCLN ( 25; 55; 75 } = 5