Дан тетраэдр DABC, К — середина ребра АС, М — середина отрезка KD, (DA) ⃗ = a ⃗, (DB) ⃗ = b ⃗, (DC) ⃗-с ⃗. Разложите вектор (ВМ)

New Year - is a International holliday. Reople celebrate it on 1th of January. To this day, New Year's holiday traditions do not change the whole world is waiting for the onset of the next year, as a miracle. The time to make a wish and wait for their execution, at the time of forgetting that it's just a date chosen by a particular person. People decorate cristmas tree, cook Olivie, Chiken, vegetable salad. Prepare each other presents.We prepare cookies and glass of milk. This day of holliday remember for a year.