gwd11-4

jojofgasw

Q4:

If S is the sum of the reciprocals of the consecutive integers from 91 to 100, inclusive, which of the following is less than S?

I.

II.

III.

A. None

B. I only

C. III only

D. II and III only

E. I, II, and III

jojofgasw

以下是引用himba在2004-12-7 12:18:00的发言： Answer: c

Reason: 1/91 < 1/90, …. , 1/100< 1/90 , so the sum of them <1/9

1/91 > 1/100 ,….., 1/100 >=1/100, so the sum of them > 1/10

thanks!

himba

Answer: c

Reason: 1/91 < 1/90, …. , 1/100< 1/90 , so the sum of them <1/9

1/91 > 1/100 ,….., 1/100 >=1/100, so the sum of them > 1/10