求lim(x→2)(x²-2x+4)急需急需啊,就现在

求极限lim(x→2)(x^2-3x+2)/(x^2+4x-12) 1.4求极限lim(x→∞) (x^2+x)/ (x^4-3x^+1) 求lim(x→0)[(x^2sin1/x)/sinx] 求极限：lim x→2 sin(x-2)/(2+x-x²) 求极限：1.lim(x→∞) (3x^2 -2)/(x^4 +x^2 -1) 2.lim(x→∞) (4x^4 -2x^ lim 3x^2-3x+2／x^2-4 求极限x→∞ 求极限lim(x→∞)2x^2-x/x^2+4 x→无穷大lim((x-4)/(x+2))^x+1 求极限 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 lim[(4x^3-2x^2+x)/(3x^3+2x)] x→0,求极限. 求极限lim(x->0)(x+e^x)^2/x 求极限（1) lim(x→2）（3x²-2x-1）/（2x³-x²+5）（2）lim（x→