純碎片
幼苗
共回答了10个问题采纳率:80% 举报
证明:(1)$1stackrel{×2}{→}2stackrel{+2}{→}4stackrel{×2}{→}8stackrel{+2}{→}10stackrel{×2}{→}20stackrel{+2}{→}22$.
也可以倒过来考虑:
22$stackrel{-2}{→}20stackrel{÷2}{→}10stackrel{-2}{→}8stackrel{÷2}{→}4stackrel{-2}{→}2stackrel{÷2}{→}1$,
(或者1$stackrel{×2}{→}2stackrel{+2}{→}4stackrel{×2}{→}8stackrel{+3}{→}11stackrel{×2}{→}22$).
(2)证明:1$stackrel{×2}{→}3×2-4stackrel{+2}{→}3×2-2stackrel{×2}{→}3×{2}^{2}-4$$stackrel{+2}{→}3×{2}^{2}-2stackrel{×2}{→}3×{2}^{3}-4stackrel{+2}{→}3×{2}^{3}-2…$
(不断乘以2,再加2)$stackrel{×2}{→}3×{2}^{96}-4stackrel{+3}{→}3×{2}^{96}-1stackrel{×3}{→}{2}^{99}+{2}^{96}-3$$stackrel{+2}{→}{2}^{99}+{2}^{96}-;1stackrel{×2}{→}{2}^{100}+{2}^{97}-2$;
注意:加法与乘法必须是交错的.
1年前
8