1/1024 + 1/512 + 1/256 +.+ 1/2 + 1 + 2 + 4 + 8 +.+512=?
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1/1024 + 1/512 + 1/256 +.+ 1/2 + 1 + 2 + 4 + 8 +.+512=?
可以分成两个等比数列来算,2的10次方是1024,2的9次方是512,2的8次方是256,以此类推,等比数列求和公式Sn=a1(1-q^n)/(1-q) =(a1-an*q)/(1-q) (q≠1).
Sn=(1/2-1/1024 *1/2)/(1-1/2)=1023/1024
或者:
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024
=1-1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024
=1-1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024
=...
=1-1/1024
=1023/1024
下一个等比数列同理,结果得:1023,.
所以最终结果就是:1023又1024分之1023
Sn=(1/2-1/1024 *1/2)/(1-1/2)=1023/1024
或者:
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024
=1-1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024
=1-1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024
=...
=1-1/1024
=1023/1024
下一个等比数列同理,结果得:1023,.
所以最终结果就是:1023又1024分之1023
1024+512+256+.+2+1+2/1+4/1+8/1+.512/1+1024/1
1\1024+1\512+1\256+...+1\2+1+2+4+8+...+1024
1/2+1/4+1/8……+1/256+1/512+1/1024 简便计算,
1+1+2+4+8+16+32+64+128+256+512+1024+2048+4096=?
1 1/1024+2 1/512+3 1/256+4 1/256+……+256 1/4+512
1+2+4+8+16+32+64+128+256+512+1024=______.
1又1/1024+2又1/512+4又1/256+...+256又1/4+512又1/2=
2/1+4/1+8/1+16/1+32/1+64/1+128/1+256/1+512/1+1024/1=?
1024+512+256+128+64+32+16+8+4+2+1等于多少?要简便运算!
1024+512+256+128+64+32+16+8+4+2+1求解
1+2+4+8+16+32+128+256+512+1024怎样算
1+2+4+8+16+32+64+128+256+512+1024+2048+4096+8192+16384+32768