41又1/3×3/4+51又1/4×4/5+61又1/5×5/6+71又1/6×6/7 的梯等式简便算法
问题描述:
41又1/3×3/4+51又1/4×4/5+61又1/5×5/6+71又1/6×6/7 的梯等式简便算法
答
=124/3×3/4+205/4×4/5+306/5×5/6+427/6×6/7
=31+41+51+61
=184