asteiner9322 asteiner9322 02-01-2024 Mathematics contestada Let a₁,a₂,…,a₂₁ be an AP such that 20∑n=1 1/aₙaₙ₊₁=49. if the sum of this AP is 189, then a₆a₁₆ is equal to :A.36B.48C.72D.57