Question

Va rog sa ma ajutați la acest exercițiu ​

Answer 1

a) Proprietatea fundamentala a doua rapoarte este: produsul mezilor trebuie sa fie egal cu produsul extremilor

a) 12/16 = 21/18

3/4 = 7/6

3x6 = 4x7

18 = 28 (fals)

b) 44/21 = 11/5,25

44x5,25 = 21x11

231 = 231 (adevarat)

c) 1,2(6) = (126-12)/90 = 114/90 = 19/15

4,5 = 45/10 = 9/2

19/15/3 = 19/9/2

19/15x9/2 = 3x19

57/10 = 57 (fals)

d) 2 1/2+3 = 5/2+3 = 5/2+6/2 = 11/2

1/2 + 1/3 = 3/6 + 2/6 = 5/6

0,(3) x 1,(2) = 3/9 x 11/9 = 1/3 x 11/9 = 11/27

11/2/5/6 = 11/27/4

11/2x4 = 5/6x11/27

22 = 55/162 (fals)