Рет қаралды 7,439
We find the coefficient of x^105 in the product (1 + x)(1 + x^2)(1 + x^3)...(1 + x^15).
00:00 Combinatorial approach
02:04 Simplifying the problem
04:18 Summary of approach
05:05 Counting ways of multiplying terms
06:23 1 or 2 "x terms"
07:12 3 "x terms"
10:10 4 "x terms"
13:20 5 "x terms"
13:49 Conclusion