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1+3+5+⋯+99=25002+4+6+⋯+100= ?\begin{aligned} 1 + 3 + 5 + \cdots + &99 = 2500\\ \\ 2 + 4 + 6 + \cdots + &100 =\ ? \end{aligned}1+3+5+⋯+2+4+6+⋯+99=2500100= ?
Hint: What is the difference between these 2 equations?
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