Algebra 2MediumWhy the Formulas Work ShareWhy the Formulas Work · Medium problemGiven an=(−1)nna_n = \dfrac{(-1)^n}{n}an=n(−1)n, find the first four terms.A−1, 12, +13, 14-1,\ \tfrac12,\ +\tfrac13,\ \tfrac14−1, 21, +31, 41B1, 12, −13, 141,\ \tfrac12,\ -\tfrac13,\ \tfrac141, 21, −31, 41C−2, 12, −13, 14-2,\ \tfrac12,\ -\tfrac13,\ \tfrac14−2, 21, −31, 41D−1, 12, −13, 14-1,\ \tfrac12,\ -\tfrac13,\ \tfrac14−1, 21, −31, 41Check Show answer Walk through it step by step Practice more like this Review this concept