1/1x3+1/3x5+1/5x7+...+1/97x99=?

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1/1x3+1/3x5+1/5x7+...+1/97x99=?1/1x3+1/3x5+1/5x7+...+1/97x99=?1/1x3+1/3x5+1/5x7+...+1/97x99=?1/1x3+1

1/1x3+1/3x5+1/5x7+...+1/97x99=?
1/1x3+1/3x5+1/5x7+...+1/97x99=?

1/1x3+1/3x5+1/5x7+...+1/97x99=?
1/1x3+1/3x5+1/5x7+...+1/97x99
=1/2(1-1/3+1/3-1/5+1/5-1/7+...+1/97-1/99)
=1/2(1-1/99)
=49/99