连锁约分计算(1/1+1*3)(1/1+2*4)(1/1+3*5)(1/1+4*6)...(1/1+98*100) (1+1/2)(1+1/4)…(1+1/10)(1-1/3)(1-1/5)...(1-1/9)(1-1/11) 还有原因. (1/1+1*3)(1/1+2*4)(1/1+3*5)(1/1+4*6)...(1/1+98*100) 题目更改为(1+1/1*3)*(1+1/2*4)*(1+1/3*5)*(1+1/4*6)*…*(1+1/97*99)*(1+1/98*100)