若lim(an^2+2n+3)/(an^2-3n+

若lim(an^2+2n+3)/(an^2-3n+4)=1/b,求ab的值

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lim n→∞ an^2+bn+1/3n-2=-2,求a,b之值
已知lim(n→∞) [(an^2+bn-100)/(3n-1)]=2,求a、b的值.
lim(an^2/(3n+1)-n)=b a+b=?
已知lim[(3n^2+cn+1)/(an^2+bn)-4n]=5,求常数a、b、c的值
在数列{an}中,a1=2,且an=1/2(a[n-1]+3/a[n-1]),(n>=2),若lim(n→∞）an存在,
lim(3n+2)an=1,lim(nan)=?
已知lim n→∞ (an^2/3n+1-n)=b,a+b=?
数列极限（已知lim[（2n-1）an]=2,求lim n*an）
lim(n->无穷)[(3n^2+cn+1)/(an^2+bn)-4n]=5
lim(n→无限大）An=1+1/3lim(n→无限大）*(1+4/9+(4/9)^2...+(4/9)^(n-2))