Question

Найдите сумму:
1) 9/c + 5/c ;
2) a/c + 4/c ;
3) a/c + b/3c ;
4) 1/c +3/2c ;
5) d/ac + c/ad ;
6) 2a/3c + a/6c .

Answer 1

$frac{9}{c}+ frac{5}{c} = frac{9+5}{c} = frac{14}{c}$ 

$frac{a}{c} + frac{4}{c} = frac{a+4}{c}$

$frac{a}{c}+ frac{b}{3c} = frac{3*a+b}{3c} = frac{3a+b}{3c}$

$frac{1}{c} + frac{3}{2c}= frac{2*1+3}{2c} = frac{5}{2c}$

$frac{d}{ac} + frac{c}{ad} = frac{d*d+c*c}{acd}= frac{d^2+c^2}{acd}$

$frac{2a}{3c}+ frac{a}{6c}= frac{2*2a+a}{6c} = frac{5a}{6c}$