(n+1)2÷(n+1)2+1=0.

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(n+1)2÷(n+1)2+1=0.
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(n+1)2÷(n+1)2+1=0.
(n+1)2÷(n+1)2+1=0.

(n+1)2÷(n+1)2+1=0.
(n+1)²÷[(n+1)²+1]=0.98
1/[(n+1)²+1]=0.02
(n+1)²+1=50
(n+1)²=49
n+1=±7
x=6或x=-8

"设(n+1)2=x(x≥0)
则有：
x/(x+1)=0.98
x=0.98x+0.98
0.02x=0.98
x=49
(n+1)2=x=49
n+1=±7
所以
n=8或n=-6"
以上回答你满意么？

令a=(n+1)²
a/(a+1)=0.98=49/50
所以50a=49a+49
a=49
(n+1)²=49
n+1=±7
n=-8,n=6

应该是：
(n+1)^2/((n+1)^2+1)=0.98
(n+1)^2=0.98((n+1)^2+1)
0.02(n+1)^2=0.98
(n+1)^2=49
n+1=7, n=6
或 n+1=-7, n=-8

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