$f_1(a,b,c,d)={\displaystyle \underset{?}{\overset{?}{}}}m(10,11,12,15)+{\displaystyle \underset{?}{\overset{?}{}}}d(4,8,14)$

$f_2(a,b,c,d)={\displaystyle \underset{?}{\overset{?}{}}}m(0,4,8,9)+{\displaystyle \underset{?}{\overset{?}{}}}d(1,10,12)$

$f_3(a,b,c,d)={\displaystyle \underset{?}{\overset{?}{}}}m(4,11,13,14,15)+{\displaystyle \underset{?}{\overset{?}{}}}d(5,9,12)$

$f_1(a,b,c,d)=$

$f_2(a,b,c,d)=$

$f_3(a,b,c,d)=$

Choose File No file chosen

This answer has not been graded yet.

Need Help? $$