f(x)=1/(3+1)+1/(3^2+1)+1/(3^3+1)……1/(3^n+1) 证明当n趋近无穷时,f(x)有极限

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f(x)=1/(3+1)+1/(3^2+1)+1/(3^3+1)……1/(3^n+1) 证明当n趋近无穷时,f(x)有极限
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f(x)=1/(3+1)+1/(3^2+1)+1/(3^3+1)……1/(3^n+1) 证明当n趋近无穷时,f(x)有极限
f(x)=1/(3+1)+1/(3^2+1)+1/(3^3+1)……1/(3^n+1) 证明当n趋近无穷时,f(x)有极限

f(x)=1/(3+1)+1/(3^2+1)+1/(3^3+1)……1/(3^n+1) 证明当n趋近无穷时,f(x)有极限