Which of the following fractions can be written as the difference of reciprocals of two consecutive integers?
Choose the correct choice from the following options.
A) 1/100 B) 1/121 C) 1/45 D) 1/56 E) 3/72
=1/n - 1/(n+1)   =1/n(n+1)   Only answer choice that satisfies above equation is 1/56   1/7*8   ANSWER:1/56
<result>D</result>
Which of the following fractions can be written as the difference of reciprocals of two consecutive integers?