He loves ______ horse very much.
A:he
B:him
C:his
coffee
已知数列{an}是非常值数列,且满足an+2=2an+1﹣an(n∈N*),其前n项和为sn,若s5=70,a2,a7,a22成等比数列.
( I)求数列{an}的通项公式;
( II)设数列 {1sn} 的前n项和为Tn,求证: 16≤Tn<38 .