X= ∑i=1N Ai × KN−i = A1 × KN−1 + A2 × KN−2 + ... + AN × K0X=\ \sum_{i=1}^N\ A_i\ \times\ K^{N-i}\ =\ A_1\ \times\ K^{N-1}\ +\ A_2\ \times\ K^{N-2}\ +\ ...\ +\ A_N\ \times\ K^0X= ∑i=1N Ai × KN−i = A1 × KN−1 + A2 × KN−2 + ... + AN × K0 转换成数字公式是什么?
