... DABC = 1 AB → x AC → 2 12 i j k - - 2 0 5 - - 1 2 1 = - -2 -5 0 5 - j + ... + c x a + 3 → b x → c + 4 x → b + → c x → a → → → + 3→bx c +4 cx ...
確定! 回上一頁