求极限lim(n→∞)(3n^2-n+1)/(2+n^2)?
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求极限lim(n→∞)(3n^2-n+1)/(2+n^2)?求极限lim(n→∞)(3n^2-n+1)/(2+n^2)?求极限lim(n→∞)(3n^2-n+1)/(2+n^2)?lim(n→∞)(3
求极限lim(n→∞)(3n^2-n+1)/(2+n^2)?
求极限lim(n→∞)(3n^2-n+1)/(2+n^2)?
求极限lim(n→∞)(3n^2-n+1)/(2+n^2)?
lim(n→∞)(3n^2-n+1)/(2+n^2)
=lim(n→∞)(3n^2+6-6-n+1)/(2+n^2)
=lim(n→∞)[3(n^2+2)-(5+n)]/(2+n^2)
=lim(n→∞)[3-(5+n)/(2+n^2)]
=3
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