Răspuns:
a. ³⁾1/2+²⁾1/3=3/6+2/6=5/6
b. ⁴⁾2/3+³⁾3/4=8/12+9/12=17/12
c. ³⁾1/4+²⁾5/6=3/12+10/12=13/12
d. ³⁾5/6+²⁾7/9=15/18+14/18=29/18
e. ²⁾1/18+³⁾1/12=2/36+3/36=5/36
f. 1/3·7²+1/3·3²+1/3·7²=1/3(7²+3²+7²)=1/3·107=107/3
g. 1/5+(1/5)²+(1/5)³=
1/5[²⁵⁾1+⁵1/5+1/25]=1/5·(25/25+5/25+1/25)=1/5·31/25=31/125