观察下列顺序排列的等式:a1=1-1⼀3, a2=1⼀2-1⼀4, a3=1⼀3-1⼀5, a4=1⼀4-1⼀6, ......则an=

2025-01-04 02:30:15
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回答1:

an=1/n - 1/(n+2)