1. 設α1 , α2 , α3 , ⋯ , αn 為滿足以下條件的?項數列:
(1) 對k = 1,2,3, ⋯ , n,αk∈ {−1,0,1,2};
(2)
=1 αk = α1 + α2 + α3 + ⋯ + αn = 16;
(3)
=1 αk2 = α1 2 + α2 2 + α3 2 + ⋯ + αn2 = 50;
(4)
=1 αk 3 = α1 3 + α2 3 + α3 3 + ⋯ + αn 3 = 70;
試求
=1 |αk | = |α1 |+|α2 | + |α3 |+ ⋯ + |αn |的值為__________。