Răspuns :
1.
a/b=1/3 =>b=3a
(a+2b)/(2a+b) = (a+6a)/(2a+3a) = 7a/5a = 7/5
2.
l=L/5 =>L=5l
l/L = l/5l = 1/5
a/b=1/3 =>b=3a
(a+2b)/(2a+b) = (a+6a)/(2a+3a) = 7a/5a = 7/5
2.
l=L/5 =>L=5l
l/L = l/5l = 1/5
1 ) a / b = 0,( 3) = 3 / 9 = 1 / 3 ⇒ b = 3 a
( a + 2 b )/ ( 2 a + b ) = ( a + 2 × 3 a ) / ( 2 a + 3 a ) = 7 a / 5 a = 7 / 5
2) latimea ( l ) = L : 5 ⇒ L = 5 × l ⇒ l / L = 1 / 5