有三列数:2 -4 8 -16 32 -64……(1) 3 =3 9 -15 33 -63……(2) 1 -2 4 -8
4个回答
-2的10次方
第二行是指那一点?
(-2)的(n-1)次方
相关问题
有三列数:2 -4 8 -16 32 -64``````` 3 -3 9 -15 33 -63``````` 1 -2
2 .-4.8 -16.32.-64.⑴ 3.-3.9.-15.33.-63 .⑵ 1 -2 4 -8 16 -32``
观察下面三行数 2,-4,8,-16,32,-64...① -1,2,-4,8,-16,32...② 3,-3,9,-1
2/1+4/3+7/8+16/15+32/31+64/63
观察下面三行数:-1,2,-4,8,-16,32 …①0,3,-3,9,-15,33 …②+2,-4,+
计算:1/2+3/4+7/8+15/16+31/32+63/64=?
条件:-2,4,-8,16,-32,64…(1) 0,6,16,18,-30,66…(2) 3,-3,9,-15,33,
1/2+3/4+7/8+15/16+31/32+63/64=127/128=?
2/1+4/3+8/7+16/15+32/31+64/63+.+128/127
1/2+3/4+7/8+15/13+31/32+63/64=