1/2+1/4+1/6+1/32+1/72=

观察下列式子：2×4+1=9=32；6×8+1=49=72；14×16+1=225=152． 求和：1/2+1/4+1/8+1/16+1/32+1/64+.+1/1024=? 1-2/1-4/1-8/1-16/1-32/1-64/1=多少? 1-2/1-4/1-8/1-16/1-32/1-64/1=?简便计算 1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+190+1/110=? 1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90= 1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=多少 1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=______ 1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+.1/9900=? 1/2+1/4+1/6+1/8+1/10+.+1/32等于多少? 计算:(1+1/2^32)(1+1/2^16)(1+1/6^8)(1+1/2^4)(1+1/2^2)(1+1/2) . 小学六年级数学题[用简便方法计算] 2/1+6/1+12/1+20/1+30/1+42/1+56/1+72/1=?5/4