化简(3+1)(32+1)(34+1)(38+1)得(  )

2个回答

  • 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.