1[tex] \frac{1}{4} [/tex] + 1:( 1[tex] \frac{1}{5} [/tex] + [tex] \frac{1}{5} [/tex] )=
=[tex] \frac{5}{4} [/tex] + 1× [tex] \frac{5}{2} [/tex] =
=[tex] \frac{5}{4} + \frac{5}{2} [/tex]=
o amplifici cu 2
=[tex] \frac{5}{4} + \frac{10}{4} [/tex]=
=[tex] \frac{15}{4} [/tex]