Method of Difference


Exercises for students
Find the sums of the following series and check your working using the above applet:

n		n		n		n
Σ	1/[ r (r + 1) ]	Σ	[ (r + 1)2 - r2 ]	Σ	[ 2r+1 - 2r ]	Σ	2/[ r (r + 1) (r + 2) ]
r = 1		r = 1		r = 1		r = 1

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