Найдите \( \overrightarrow {EC}+\overrightarrow {DE}{ .}\) \( \overrightarrow {EC}+\overrightarrow {DE}=\)
Задание

Найдите \(\displaystyle \overrightarrow {EC}+\overrightarrow {DE}{\small .}\)

\(\displaystyle \overrightarrow {EC}+\overrightarrow {DE}=\)