二项展开式中项的几个性质

摘要

通过构造二项式项三角形和项平行四边形，揭示了项的递推关系、项三角形中的三向和、项平行四边形中项的对称性规则及项的有关微分性质．%According to constructing item triangle and item parallelogram of binomial, this paper will state some properties of item in binomial. It includes recurrence relations of item, the three direction sum of item triangle, the symmetry of item in item parallelogram and differential property of item.