QOD-02/06/13 find the sum

11.3+12.4+13.5... till infinite terms

2 Answers

865
Soumyadeep Basu ·

The given expression can be rewritten as
12(1-13+12-14+13-15+....

=12(1+12) =34.

1357
Manish Shankar ·

No one for this?

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