解题思路: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.
(3+1)(32+1)(34+1)(38+1)
=
1
2](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).
故选D.
点评:
本题考点: 平方差公式.
考点点评: 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.