Răspunsuri

2014-05-20T21:03:40+03:00

0,3 = 3/10

0,(3)= 3/9= 1/3

0.25 = 25/100= 1/4

notezi rapotrul cu k si ai

a = 10k/3

b = 3k

c= 4k

Ma = (10k/3 + 3k)/2 = 40 ⇒10k/3+3k = 80 ⇒ 10k + 9k = 240⇒ 19k = 240 => k = 240/19

c = 4·240/19 etc