Ký hiệu hệ lực cân bằng?A. \(\overrightarrow {{F_1}} + \overrightarrow {{F_2}} + \ldots + \overrightarrow {{F_n}} \equiv 0\)B. \(\left( {{{\vec F}_1},\overrightarrow {{F_2}} , \ldots ,\

\(\overrightarrow {{F_1}} + \overrightarrow {{F_2}} + \ldots + \overrightarrow {{F_n}} \equiv 0\)

\(\left( {{{\vec F}_1},\overrightarrow {{F_2}} , \ldots ,\overrightarrow {{F_n}} } \right) \equiv 0\)

\({\vec F_1},\overrightarrow {{F_2}} , \ldots ,\overrightarrow {{F_n}} \equiv 0\)

\(\left( {{{\vec F}_1},\overrightarrow {{F_2}} , \ldots ,\overrightarrow {{F_n}} } \right) = 0\)