一、1、规律为3n*(-1)n+1n与n+1都是指数2、3n*(-1)n+1-2 3n*(-1)n/33、带进去:-6561-6561+2+2187=-10933 二、1、 4+4.5-1=7.5 27+7.5=34.5 2、最高18日27+4+4.5=35.5 3、27+4+4.5-1-2.5-6+2=28 ...
一、观察下面的三列数:①3,-9,27,-81,243…②1,-11,25,-83,241… ③-1,3,-9,27,-
1个回答
相关问题
-
观察下面的数(1)3,9,27,81,243,729,...(2)1,7,25,79,241,727,...(3)1,3
-
观察下面三行数,-3,9,-27,81,-243…… 1,13,-23,85,-239…… 1,-3,9,-27,81
-
观察下面三行数,-3,9,-27,81,-243…… 1,13,-23,85,-239…… 1,-3,9,-27,81
-
观察下面三行数:-3,9,-27,81,-243,…-5,7,-29,79,-245,…-1,3,-9,27,-81…(
-
一道数学题~~大家进来看看!观察下面的数:3,9,27,81,243,729,…1,7,25,79,241,727,…1
-
观察下面三行数:1:-3,9,-27,81,-243;2:0,12,-24,84,-240;3:1,-3,9,-27,8
-
①-3,9,-27,81,-243,729,...②0,12,-24,84,-241,732,...③-1,3,-9,2
-
初中数学题啊,紧急啊!~~3.9.27.81.243.729…………1.7.25.79.241.727…………1.3.9
-
观察下面三行数:-3.9.-27.81.-243.-5.7.-29.79.-245.
-
观察下面两列数;1.3,9,27,81,243,729…… 2.2,5,10,17,26,37……