6.已知数列{aS n = 2 n − 1 {S}_{n}={2}^{n}-1 , 当n=1时,a 1 =1, 当n≥2时, a n = S n −
6.已知数列{aS n = 2 n − 1 {S}_{n}={2}^{n}-1 , 当n=1时,a 1 =1, 当n≥2时, a n = S n −
发布时间:2025-11-29 02:11:29
6.已知数列{aS n = 2 n − 1 {S}_{n}={2}^{n}-1 , 当n=1时,a 1 =1, 当n≥2时, a n = S n −