x→∞时lim[(2n+1)^5(3n-5)^4]/(2n-3)^9=?

lim 9^n+4^n+2/5^n-3^2n-1 n趋于无穷大时 lim((5^n-4^(n-1))/((5^(n+1)+3^(n+2)) n→∞时的极限是多少? 求极限lim(x→∞)（1/n+2/n+3/n..+n/n） 微积分lim(根号n^4+n+1)(3n+4)= （n->∞)lim{[(5x^2+1/3x-1)*sinx^-1]+( lim(x→∞）1+2+3+…+n/(n+2)(n+4)=? lim(3^2n+5^n)/(1+9^n) lim(n→∞)3n^2+5n-7/4-n^2的值是 求极限 lim(n→∞)[根号(n^2+4n+5)-(n-1)] = 求极限lim(-2)^n+3^n/(-2)^[n+1]+3^[n+1] (x→∞) 求极限,lim(x->0) (1-2sinx)^(3/x)lim(n->+∞) (n!-4^n) / (6+ln(n)+ lim(n->∞){1/2*4+1/3*5+...+1/(n+1)(n+3)=? 求lim n→∞ (1+2/n)^n+3