题目内容
若等差数列满足,,则的值是
(A) 20 (B) 36 (C) 24 (D) 72
C
若等差数列满足,,则的值是 ( )
A.20 B.36 C.24 D.72
若等差数列满足,,则公差______;______.
(原创)若等差数列满足,,则的值是 ( )