128分之一加64分之一加32分之一……加4分之一加2分之一简便计算
2分之1加4分之1加8分之一加16分之1加32分之1加64分之1加128分之1=(1-1/2)+(1/2-1/4)+(1/4-1/5)+(1/16-1/32)+(1/32-1/64)+(1/64-1/128)
=1-1/128
=127/128
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绛旓細=1-1/2+1/2-1/4+1/4-1/8 =1-1/8 =7/8 --- 2鍒嗕箣1鍔4鍒嗕箣1鍔8鍒嗕箣1鍔16鍒嗕箣1鍔32鍒嗕箣1鍔64鍒嗕箣1绠渚胯绠1/2+1/4+1/8+1/16+1/32+1/64 =(1/2+1/4+1/8+1/16+1/32+1/64+1/64)-1/64 =1-1/64 =63/64 鐢ㄥ熶竴鎹竴鐨勬柟娉曪紝鍏堝熶竴涓1/64锛岀劧鍚庣敤鎷彿...
绛旓細鍘熷紡=1-1/2+1/2-1/4+1/4-1/8+1/8+鈥︹-1/64+1/64-1/128 =1-1/128 =127/128
绛旓細鐧鍒嗕箣浜岀櫨浜屽崄鍥
绛旓細=(32+16+8+4+2)/128 =62/128 =31/64
绛旓細1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256 =1-1/256 =255/256
绛旓細鎶1024鍒嗕箣1鏀惧埌鏈鍚庨潰鍜屽彟涓涓1024鍒嗕箣1鐩稿姞鍙樻垚512鍒嗕箣1 鐒跺悗浠庡彸寰宸︿緷娆″姞杩囨潵 鏈鍚庣粨鏋滀负16鍒嗕箣1
绛旓細1/2+1/4+1/8+1/16+1/64+1/128 =64/128+32/168+16/128+8/128+1/128 =121/128
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