lim(x2-4x+5)/2x2-x-1 x→∞

lim(x2-4x+5)/2x2-x-1 x→∞ lim(根号X2+X-根号X2+1) lim[4/(4-x2) - 1/(2+x)]x∝-2 Lim(x→1） (x2-4x-5 )/(x2-1)求极值 计算极限 lim X2-3X+2 -------------- x→2 X2+5X-6lim X2-3X+2------------x→2 X2+5X-6 lim x-∞ x2-1/3x2+x 求极限 求极限lim X→∞ [1+ x2/2 -√(1+ x2)]/(cos x –e x2 )sin x2 亲 计算:x2-5x+6/x2-4x+3 + x2-4x+3/x2-2x+1 + x2-3x-4/1-x2 lim sin(x2-1)/x-1 lim(4x-3)sinx/3x2-2x+5 x趋向无穷 求极限 (1-x2)(x2-4x+5) 不等式（x2-4x-5)(x2+1) lim x-2 (x3-8)/(x2-4) 求极限 lim((1/x2)-(ctgx)2) x趋向0的极限值 x2-4x+3分之x2-5x+6+s2-2x+1分之x2-4x+3+1-x2分之x2-3x-4的过程 1/(x2+x)+1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=4/21x2是x的平方 2 X2(平方) - 3X -5 Lim ——————————X→∞ 4 X2(平方) + 1 9 5x2—[x2+(4x—x2)—2(x2—3x)]