The sum of the first n terms of an is Sn, A1 = 2, and the mean difference of A2, A3 is S2 The sum of the first n terms of an is Sn, A1 = 2, and the median of the differences of A2 and A3 is S2, 1. The general formula of an 2. Let BN = log2an, find the first n terms and TN of sequence {BN}

The sum of the first n terms of an is Sn, A1 = 2, and the mean difference of A2, A3 is S2 The sum of the first n terms of an is Sn, A1 = 2, and the median of the differences of A2 and A3 is S2, 1. The general formula of an 2. Let BN = log2an, find the first n terms and TN of sequence {BN}

(1)
an= a1q^(n-1)
The median of the two is S2
a2+a3= 2S2
a1q(1+q) = 2a1(1+q)
q=2
an =2^n
(2)
bn=logan
=n
Tn =b1+b2+...+bn =n(n+1)/2