a1=1,a(n+1)=an+1/an,求前5项和

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a1=1,a(n+1)=an+1/an,求前5项和
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a1=1,a(n+1)=an+1/an,求前5项和
a1=1,a(n+1)=an+1/an,求前5项和

a1=1,a(n+1)=an+1/an,求前5项和
a1=1
a2=a1+1/a1=1+1/1=2
a3=a2+1/a2=2+1/2=5/2
a4=a3+1/a3=5/2+2/5=29/10
a5=a4+1/a4=29/10+10/29=941/290
S5=a1+a2+a3+a4+a5=3377/290

a1=1
a2=a1+1/a1=1+1/1=2
a3=a2+1/a2=2+1/2=5/2
a4=a3+1/a3=5/2+2/5=29/10
a5=a4+1/a4=29/10+10/29=941/290
S5=a1+a2+a3+a4+a5=3377/290
通项不好求，也没必要求。

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