Question 2 - A-Level Maths

Exam Board	AQA
Module	FP2 (Further Pure Mathematics 2)
Year	2010
Session	June
Topic	Sequences and series, recurrence and convergence

Express $\frac { 1 } { r ( r + 2 ) }$ in partial fractions.
Use the method of differences to find $$\sum _ { r = 1 } ^ { 48 } \frac { 1 } { r ( r + 2 ) }$$ giving your answer as a rational number.