1-1/2+1/3-1/4+1/5-1/6…+1/99-1/100)/(1/51+1/52+1/53+…+1/99+1/
1/2*3+1/4*5+1/6*7+...+1/98*99+1/51+1/52+1/53+...1/99
线性代数解行列式1/2 1/3 1/4 1/51/3 1/4 1/5 1/61/4 1/5 1/6 1/7 1/5 1/
(1/1+2)+(1/1+2+3)+...+(1/1+2+3+4+...+50) = (1+1/51)*(1-1/51)
1/2*3+1/4*5+1/5*6+.+1/98*98+1/51+1/52+.1/100得多少?
1+1 2+2 3+1 4+4 51+1
计算1/1*6+1/6*11+1/11*16+1/16*21+.+1/51*56
(3-1/51)*17?
0 1 3 9 ) 51
51+1+2+3+4
(1/1*2+1/3*4+1/5*6+1/7*8+...+1/99*100)/(1/51+1/52+...+1/100)
1/1*1/3+1/3*1/5+1/5*1/7+.1/49*1/51等于多少,