if i had the letters A,B,C,D,E,F,G,H,I in cells A1 thru A9, how could i show all combinations of these nine letters (one letter per cell) in columns B thru J? this would include A, B, AB, ABC, ABCD, etc. per the formula for combinations without replacement, i know i should end up with 511 different combinations (thus, the solution will use 511 rows). any suggestions for how to do with without using macros?
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