42+1/3+1/9+1/27+1/81+1/243+1/729
问题描述:
42+1/3+1/9+1/27+1/81+1/243+1/729
答
42+1/3+1/9+1/27+1/81+1/243+1/729=42 364/729(不知如何输入,42又729分之364,即30982/729)
答
原式=42+(243+81+27+9+3+1)/729=42+364/729
答
原式=41+(1+1/3+1/9+1/27+1/81+1/243+1/729)
=41+【1-(1/3)六次方】/(1-1/3)=41+(728/729)/(2/3)=41+364/243=42+121/243
一楼算错了