观察5/3,7/5,9/7,11/9,13/11……的规律,第n个数为大神们帮帮忙

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观察5/3,7/5,9/7,11/9,13/11……的规律,第n个数为大神们帮帮忙观察5/3,7/5,9/7,11/9,13/11……的规律,第n个数为大神们帮帮忙观察5/3,7/5,9/7,11/9

观察5/3,7/5,9/7,11/9,13/11……的规律,第n个数为大神们帮帮忙
观察5/3,7/5,9/7,11/9,13/11……的规律,第n个数为大神们帮帮忙

观察5/3,7/5,9/7,11/9,13/11……的规律,第n个数为大神们帮帮忙
(2n+3)/(2n+1)