问题详情:
已知:31=3,32=9,33=27,34=81,35=243,36=729…,设A=2(3+1)(32+1)(34+1)+1,则A的个位数字是 .
【回答】
1.【解答】解:A=(3﹣1)(3+1)(32+1)(34+1)+1
=(32﹣1)(32+1)(34+1)+1
=(34﹣1)(34+1)+1
=+1
=+1
=364﹣1+1
=364,
观察已知等式,个位数字以3,9,7,1循环,
则A的个位数字是1,
故*为:
知识点:整式的乘法
题型:填空题
问题详情:
已知:31=3,32=9,33=27,34=81,35=243,36=729…,设A=2(3+1)(32+1)(34+1)+1,则A的个位数字是 .
【回答】
1.【解答】解:A=(3﹣1)(3+1)(32+1)(34+1)+1
=(32﹣1)(32+1)(34+1)+1
=(34﹣1)(34+1)+1
=+1
=+1
=364﹣1+1
=364,
观察已知等式,个位数字以3,9,7,1循环,
则A的个位数字是1,
故*为:
知识点:整式的乘法
题型:填空题