lim x趋向+无穷 √(4x^2+1)-X / X-1

lim x趋向+无穷 √(4x^2+1)-X / X-1 lim(x趋向无穷)[1-(2/x)]^3x lim(x趋向无穷)根号(4x^2-x+1)-2X的极限 lim x(arctg((x+1)/(x+2))-∏/4),x趋向无穷 导数计算问题lim x趋向无穷[(x-3)(2x^2+1)]/(2-7x^3)lim x趋向4 [e^x+cos(4-x lim （n趋向无穷）（x/1+x)x次方 lim(x趋向正无穷)[x]*sin(1\x)=? lim(x趋向于无穷)(1+3/x)^(x-3) 一道大一高数题求解求 lim x趋向无穷( √x-2 ) -(√x)/(√ x-1 ) -(√x) 当x趋向于正无穷,求lim{{(x+1）^2*(3x-1)^3}/x^4*(x+4)} 求下列式子的值(1)lim(x趋向无穷） (2x+7)/[(x-1)(x+2)]=?(2)lim(x趋向无穷） (3x^ x趋向无穷时,求lim e^-x乘以(1+1/x)^(x^2),求方法,