CC

Multiplicative Inverse Find the multiplicative inverse of 5 (mod 72)

Solutions of Indefinite Equation ∑i=1mxi=x1+x2+⋯+xm=n\sum_{i=1}^m{x_i}=x_1+x_2+\cdots+x_m=n∑i=1m​xi​=x1​+x2​+⋯+xm​=n Num of positive integer solutions: Cn−1m−1C^{m-1}_{n-1}Cn−1m−1​ Num of nonnegative...