化简(3+1)(32+1)(34+1)(38+1)得( )A. (38+1)2B. (38-1)2C. 316-1D. 12(316−1)
问题描述:
化简(3+1)(32+1)(34+1)(38+1)得( )
A. (38+1)2
B. (38-1)2
C. 316-1
D.
(316−1) 1 2
答
(3+1)(32+1)(34+1)(38+1)
=
(3-1)(3+1)(32+1)(34+1)(38+1)1 2
=
(32-1)(32+1)(34+1)(38+1)1 2
=
(34-1)(34+1)(38+1)1 2
=
(38-1)(38+1)1 2
=
(316−1).1 2
故选D.
答案解析:根据平方差公式将(3+1)(32+1)(34+1)(38+1)进行化简,即可求出答案.
考试点:平方差公式.
知识点:本题考查了平方差公式,属于基础题,解答本题的关键是掌握平方差公式.