1/3,1/24,1/36,1/49,( )
1/3,1/24,1/36,1/49,( )A.1/62 B.1/63 C.1/64 D.1/64
数列计算求教1/3,1/24,1/36,1/49,)2401,343,),73,7,47,2207,)13,39,117
1/13,1/24,1/27,1/49,(),1/99
(1-1/4)*(1-1/9)*(1-1/16)*(1-1/25)*(1-1/36)*(1-1/49)如何计算
(1-1/4)(1-1/9)(1-1/16)(1-1/25)(1-1/36)(1-1/49)=?
1,4,9,16,25,36,49,( )
计算:(1)根号49+根号36
81,64,49,36,( ),( ),9,4,1
1,2,7,13,49,24,343
1/1*2+1/2*3+.+1/49*50
(1-1/4)x(1-1/9)x(1-1/16)x(1-1/25)x(1-1/36)x(1--1/49)x(1--1/4
(1/15+3/49)*15-1/49 简便计算