20-5/2-9/4-17/8-33/16-65/32-29/64=?
问题描述:
20-5/2-9/4-17/8-33/16-65/32-29/64=?
答
20-5/2-9/4-17/8-33/16-65/32-129/64
=20-2×6-(1/2+1/4+1/8+1/32+1/64+1/128)
=8-(1-1/128)
=7又1/128