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锟斤拷源锟斤拷锟斤拷锟斤拷锟絎(w锟斤拷ng) 2021-11-29 22:57:35

锟斤拷锟斤拷锟饺差數(sh锟斤拷)锟斤拷锟角革拷锟叫旓拷(sh锟斤拷)锟絎锟叫碉拷一锟斤拷锟斤拷要锟斤拷(n锟斤拷i)锟斤拷锟斤拷锟斤拷么锟斤拷锟饺差數(sh锟斤拷)锟斤拷锟斤拷锟斤拷些锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟叫★拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟锟斤拷

锟斤拷锟斤拷1锟饺差數(sh锟斤拷)锟斤拷锟斤拷凸锟绞斤拷锟斤拷锟叫

锟斤拷锟斤拷锟饺差數(sh锟斤拷)锟叫癸拷式an=a1+(n-1)d

锟斤拷锟斤拷前n項和癸拷式锟介:Sn=na1+n(n-1)d/2

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷d=1锟絩锟斤拷Sn=(a1+an)n/2

锟斤拷锟斤拷锟斤拷m+n=p+q锟絫锟斤拷锟斤拷锟斤拷am+an=ap+aq

锟斤拷锟斤拷锟斤拷m+n=2p锟絫锟斤拷am+an=2ap

锟斤拷锟斤拷锟斤拷n項碉拷值an=锟斤拷锟+锟斤拷項旓拷(sh锟斤拷)-1锟斤拷×锟斤拷锟斤拷

锟斤拷锟斤拷前n項的猴拷Sn=锟斤拷锟+末锟×項旓拷(sh锟斤拷)(項旓拷(sh锟斤拷)-1锟斤拷锟斤拷锟斤拷/2

锟斤拷锟斤拷锟斤拷锟斤拷d=(an-a1)÷锟斤拷n-1锟斤拷

锟斤拷锟斤拷項旓拷(sh锟斤拷)=锟斤拷末锟-锟斤拷項o拷÷锟斤拷锟斤拷+1

锟斤拷锟斤拷锟斤拷(sh锟斤拷)锟叫烇拷锟芥數(sh锟斤拷)項時锟斤拷前n項的猴拷=锟斤拷锟絞锟×項旓拷(sh锟斤拷)

锟斤拷锟斤拷锟斤拷(sh锟斤拷)锟叫烇拷偶锟斤拷(sh锟斤拷)锟锟斤拷锟斤拷锟斤拷尾锟斤拷锟接o拷锟斤拷锟斤拷锟侥和筹拷锟斤拷2

锟斤拷锟斤拷锟饺诧拷锟斤拷項癸拷式2an+1=an+an+2锟斤拷锟斤拷{an}锟角等差數(sh锟斤拷)锟斤拷

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锟斤拷锟斤拷小锟斤拷锟斤拷锟絔锟斤拷锟竭匡拷锟斤拷锟狡旓拷(sh锟斤拷)锟絎锟斤拷锟斤拷(sh锟斤拷)锟截憋拷锟斤拷式锟斤拷全

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