1/2+1/4+1/8+…+1/2的6次方
=(1-1/2)+(1/2-1/4)+(1/4-1/8)+.(1/2的5次方-1/2的6次方）
=1-1/2+1/2-1/4+1/4-1/8+.-1/2的6次方
=1-1/2的6次方
=63/64
祝开心
怎么算你能算出1/2+1/4+1/8+…+1/2的6次方
1/2+1/4+1/8+…+1/2的6次方
=(1-1/2)+(1/2-1/4)+(1/4-1/8)+.(1/2的5次方-1/2的6次方）
=1-1/2+1/2-1/4+1/4-1/8+.-1/2的6次方
=1-1/2的6次方
=63/64
祝开心