作业帮2/1+4/1+8/1+16/1+32/1+64/1+128/1=?
来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/09/18 13:01:06
2/1+4/1+8/1+16/1+32/1+64/1+128/1=?
2分之1一般表示为1/2,而不是2/1
1/2+1/4+1/8+1/16+1/32+1/64+1/128
=1/2+1/4+1/8+1/16+1/32+1/64+(1/128+1/128)-1/128
=1/2+1/4+1/8+1/16+1/32+(1/64+1/64)-1/128
=1/2+1/4+1/8+1/16+(1/32+1/32)-1/128
=1/2+1/4+1/8+(1/16+1/16)-1/128
=1/2+1/4+(1/8+1/8)-1/128
=1/2+(1/4+1/4)-1/128
=1/2+1/2-1/128
=1-1/128
=127/128
中文解释显得不必要,加几个括号你应该能看得懂~~~
1/2+1/4+1/8+1/16+1/32+1/64+1/128
=1/2+1/4+1/8+1/16+1/32+1/64+(1/128+1/128)-1/128
=1/2+1/4+1/8+1/16+1/32+(1/64+1/64)-1/128
=1/2+1/4+1/8+1/16+(1/32+1/32)-1/128
=1/2+1/4+1/8+(1/16+1/16)-1/128
=1/2+1/4+(1/8+1/8)-1/128
=1/2+(1/4+1/4)-1/128
=1/2+1/2-1/128
=1-1/128
=127/128
中文解释显得不必要,加几个括号你应该能看得懂~~~
1/2+1/4+1/8+1/16+1/32+1/64+1/128=1-1/128 找规律
128+64+32+16+8+4+2+1+2/1+4/1+8/1+16/1+32/1=?
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256
1/2-1/4-1/8-16/1-32/1-64/1-128/1-256/1
1+1/2+1/4+1/8-1/16+1/32+1/64-1/128+1/256=?简便运算
简便计算1/2+1/4+1/8+1/16+1/32+1/64+1/128
1/2+1/4+1/8+1/16+32/1+1/128没有1/64简算
1/2+1/4+1/8+1/16+1/32+1/64+1/128
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256=
2/1+4/1+8/1+16/1+32/1+64/1+128/1+256/1=?
计算：1-2\1-4\1-8\1-16\1-32\1-64\1-128\1=?