1.

The sum of the series 2⋅ 20C0+5⋅ 20C1+8⋅ 20C2+11⋅ 20C3+⋯+62⋅ 20C20 is equal to:

Answer»

The sum of the series
2 20C0+5 20C1+8 20C2+11 20C3++62 20C20
is equal to:



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