1/128+1/64+1/32+…+1/4

1/128+1/64+1/32+…+1/4 8/1+16/1+32/1+64/1+128/1 1/8-1/16-1/32-1/64-1/128 1/128+1/64+1/32+...+1/4简便运算 128分之1+64分之1+32分之1+……+4分之1这题怎么算啊 1+2+4+8+16+32+64+128+……2的n次方等于多少? 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 1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 1/2+1/4+1/8+1/16+1/32+1/64+1/128+.+1/1024 1-2/1-4/1-8/1-16/1-32/1-64/1-128/1 1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256 计算:1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+……+1/2^n 1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256……+1/2^n 1+2+4+8+16+32+64+128+256……加64次等于几 1+2+4+8+16+32+64+128+256……加64次能让人明白些 简便计算1/2+1/4+1/8+1/16+1/32+1/64+1/128 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