赚现金
已知等比数列 a n 满足 a n > 0 , n = 1 , 2 … ,且 a 5 ⋅ a 2 n - 5 = 2 2 n n ≥ 3 ,则当 n ≥ 1 时, log 2 a 1 + log 2 a 3 + … + log 2 a 2 n - 1 = ( )
n 2 n - 1
n + 1 2
n 2
n - 1 2
试题篮