Question

Ex 20 repede.Dar sa pot intelege va rog si in detaliat

Answer 1

fractia echiunitara are numaratorul egal cu numitorul

$\frac{3}{a+3} = \frac{3}{0+3} = \frac{3}{3} =1 =\ \textgreater \ a=0 \\ \\ \frac{a+3}{7} = \frac{4+3}{7} = \frac{7}{7} =1 =\ \textgreater \ a=4 \\ \\ \frac{a-4}{2} = \frac{6-4}{2} = \frac{2}{2} =1 =\ \textgreater \ a=6 \\ \\ \frac{a+1}{4-2} = \frac{1+1}{4-2} = \frac{2}{2} =1 =\ \textgreater \ a=1$