Răspuns:
Explicație pas cu pas:
a=1/2+1/3+1/4=(6+4+3)/12=13/12
b=1/2+2/3+3/4=(6+8+9)/12=23/12
[tex]a=\frac{1}{2}+\frac{1}{3} +\frac{1}{4}[/tex]
Dam factor comun 12. Prima fractie se amplifica cu 6, a doua fractie se amplifica cu 4, iar a treia fractie se amplifica cu 3.
[tex]a=\frac{6}{12}+ \frac{4}{12}+ \frac{3}{12} \\\\a=\frac{13}{12}[/tex]
[tex]b=\frac{1}{2} +\frac{2}{3} +\frac{3}{4}[/tex]
Dam factor comun 12. Prima fractie se amplifica cu 6, a doua fractie se amplifica cu 4, iar a treia fractie se amplifica cu 3.
[tex]b=\frac{6}{12}+ \frac{8}{12}+ \frac{9}{12} \\\\b=\frac{23}{12}[/tex]
