丨1-2/1丨+丨2/1-3/1丨+丨3/1-4/1丨…+丨99/1-100/1丨要过程,

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丨1-2/1丨+丨2/1-3/1丨+丨3/1-4/1丨…+丨99/1-100/1丨要过程,
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丨1-2/1丨+丨2/1-3/1丨+丨3/1-4/1丨…+丨99/1-100/1丨要过程,
丨1-2/1丨+丨2/1-3/1丨+丨3/1-4/1丨…+丨99/1-100/1丨要过程,

丨1-2/1丨+丨2/1-3/1丨+丨3/1-4/1丨…+丨99/1-100/1丨要过程,