Question

hellllpppp, repede va rog mult de tot!!!!!

Answer 1

2.
V₁/V₂=5/2
100/V₂=5/2
V₂=2×100/5=40 litri


3

a)(4/3×1/2+2/3×2)/(3/2×1/2)=(2/3+4/3)/1/3
(4/6+4/3)/(3/4)=(6/3)/1/3
(12/6)×4/3=2×3
2×4/3=2×3
8/3=6 
8=18   fals


b) 3/4=6/8
3×8=6×4
24=24    adevarat

c)5/2=15/16
5×16=2×15
80=30   fals


d) 6/7 = (9:2)/(21:4)
 7 ×(9:2)=6×(21:4)
 63/2=126/4
 63/2=63/2    adevarat

e) (1+5/9)/2=3/(2+13/7)
(14/9)/2=3/[(14+13)/7]
7/9=3/(27/7)
7/9=7/9   adevarat

f)
[2/3+1/3:(1/5+1/15)]/(1/2-1/4)=(23/12)/(1/6)
[2/3+1/3:(4/15)]/(2/4-1/4)=(23/12)×6
(2/3+1/3×15/4)/(1/4)=23/2
(2/3+5/4)/(1/4)=23/2
[(8+15)/12]/(1/4)=23/2
23/12×4=23/2
23/3=23/2  
 3×23=2×23    fals