Question

Calculeaza scotand factorul comun:1 /12•1 /2+1/12•1/3+1/12•13/6

Answer 1

1 /12•1 /2+1/12•1/3+1/12•13/6 =

1/12 · (1/2  +  1/3 +  13/6) =

1/12 · (3 + 2 + 13)/6 =

1/12 · 18/6 =

1/12  ·  3 =

3/12 =

1/4