Permutation and CombinationPermutation and Combination 1 May 20211 May 2021 | JeffYJeffY | 0 Comment | 12:39 pm Geometric Sequences and Sums Review last time: 1 + 2 + 4 + 8 + 16 + 32 + 64 + 128 = 128 * 2 – 1 BINARY CODE READ MOREREAD MORE