prep2-29

29.   3873-!-item-!-187;#058&003594

If n denotes a number to the left of 0 on the number line such that the square of n is less than  1/100, then the reciprocal of n must be

(A) less than -10

(B) between -1 and 

(C) between   and 0

(D) between 0 and 

(E) greater than 10

答案是A，请问是怎么做的，感觉我的理解好像不太对，谢谢。

N^2<1/100

1/10>N>-1/10

因为N是负数

所以1/N<-10