2/3+5/2+7/2= va rog am mare nevoie de acest ex dau coroana

[tex]\frac{2}{3}[/tex]+[tex]\frac{5}{2}[/tex]+[tex]\frac{7}{2}[/tex]=

²[tex]\frac{2}{3}[/tex]+³[tex]\frac{5}{2}[/tex]+³[tex]\frac{7}{2}[/tex]=

[tex]\frac{4}{6}[/tex]+ [tex]\frac{15}{6}[/tex]+[tex]\frac{21}{6}[/tex]=

[tex]\frac{40}{6}[/tex]

Unde am pus 2 si 3 in fata, trebuie amplificat cu acele numere.

[tex] \frac{2}{3} + \frac{5}{2} + \frac{7}{2} = \frac{20}{3} = 6 \frac{2}{3} = 6.666667[/tex]
Rezultatul rezulta din:

[tex]a) \: \frac{2}{3} + \frac{5}{2} = \frac{2 \times 2}{3 \times 2} + \frac{5 \times 3}{2 \times 3} = \frac{4}{6} + \frac{15}{6} = \frac{4 + 15}{6} = \frac{19}{6} [/tex]

si adaugam

[tex]b) \: \frac{19}{6} + \frac{7}{2} = \frac{19}{6} + \frac{7 \times 3}{2 \times 3} = \frac{19}{6} + \frac{21}{6} = \frac{19 + 21}{6} = \frac{40}{6} = \frac{20}{3} [/tex]
Sper ca te-am ajutat!!!