數(shù)列{a_n}滿足a_n+1＋(－1)ⁿ a_n＝2n－1，則{a_n}的前60項(xiàng)和為_(kāi)___________.

已知數(shù)列的前項(xiàng)和，則此數(shù)列的通項(xiàng)公式為          

若數(shù)列與滿足，且,設(shè)數(shù)列的前項(xiàng)和為，則=.

數(shù)列{a_n}中，a₁＝，前n項(xiàng)的和S_n＝n²a_n，則a_n＋1＝________.

數(shù)列的通項(xiàng)公式，則該數(shù)列的前_________項(xiàng)之和等于．

數(shù)列的前項(xiàng)和,則     ．

對(duì)任意，函數(shù)滿足，設(shè)，數(shù)列的前15項(xiàng)的和為，則     ．

對(duì)任意，函數(shù)滿足，設(shè)，數(shù)列的前15項(xiàng)的和為，則     ．

已知數(shù)列{a_n}中, , m為正整數(shù), 前n項(xiàng)和為，則=____________．

已知數(shù)列是等差數(shù)列，且a₂=3，并且d=2，則=_______