求极限lim(x→3)x^2-4x+3/x^2-9

求极限lim(x→2)(x^2-3x+2)/(x^2+4x-12) lim 3x^2-3x+2／x^2-4 求极限x→∞ 求极限lim(x→3)x^2-4x+3/x^2-9 lim→1 （X^2-3X+2)/(X^2+4X-5) 求极限 求极限lim(x→3)cosx 求极限lim(x-3)/(x^-9)(x→3) 求极限lim(x→0)x-sinx/x^3 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 求极限lim(1-2/x+3/x^2)^x 求极限lim(x+3)(2+cosx)/(x^2+x) 求极限 lim [(3+x)/(6+x)]^[(x-1)/2]= x→∞求极限 lim [(3+x)/(6+x)]^[(x-1)/2]=x→∞ lim(1-x)^3/x 求极限~ lim[(4x^3-2x^2+x)/(3x^3+2x)] x→0,求极限. 求lim(x^2+2x)/(x^3-3x+2),x→无穷的极限 lim x→2 √(x^2+5)-3/x^2-4 求极限 求极限lim(x→∞)(2x/3-x)-(2/3x)求极限lim(x→5)根号(x-1)-2/x-5 求极限.lim(x^3_3 x 2)除以(x^4_4x 3)求极限.lim(x^3-3 x +2)除以(x^4-4x+ 3) 求极限 lim(x→∞)5x/(x-4) 求极限 lim(x→-∞)[(√1-x)-3]求极限 lim(x→∞)5x/(x-4)求极限 lim(x→-∞)[(√1-x)-3]/2+√x