lim n→无限 (2n-1)/(4n^2-1)

问题描述:

lim n→无限 (2n-1)/(4n^2-1)
1.lim n→无限(2n-1)/(4n^2-1)
2.lim n→无限 ³√(n+1) /√(2n^2-3)
3. lim x→1 (x^4-1)/(x^3-1)
[详细过程]

1)(2n-1)/(4n²-1)=1/(2n+1) ∴原式=lim n→∞[1/(2n+1)]=lim[(1/n)/(2+1/n)]=0/2=02) 原式=lim n→∞ ³√(1+1/n)/(8n^4-36n²+54-27/n²)^(1/6)=(1/∞)=0【[(2n²-3)³/n²]^(1/6)={...