lim(x趋于无穷)[(x+3)/(x^2-x)]*（sinx+2）,求函数极限

lim趋于无穷.(x+2/x+3)^2x lim(x+sinx)/(3x-arctanx)(x趋于无穷） lim(x+1)^x+1(x+3)^x+3/x^2x+4 x趋于无穷 lim(x/x-c)^x=2 x趋于无穷 lim(x+1/x+2)^x=?x趋于无穷 lim(x趋于无穷)(x/1+x)^(x+2)=? lim (1-X-X^3)/(x+x^3) X 趋于正无穷 极限无穷小? lim (1-X-X^3)/(x+x^3) X 趋于正无穷 极限无穷小? lim（x^2+2x-5）/（x^3+x+5）,x趋于无穷 lim(1-1/x)^(根号下x) x趋于无穷 lim In(1+e^x)/x x趋于正无穷 求极限的疑惑：xsin2/x,x趋于无穷的极限,如果用极限运算法则：lim(x趋于无穷）xsin2/x=lim(x趋于无穷）x*lim(x趋于无穷）sin2/x,简单的分析lim(x趋于无穷）x趋于无穷,lim(x趋于无穷）sin2/x趋于零（因 求极限 lim(3-2x/2-3x)^x ,x趋于无穷 lim（x-3/x）3x次方 x趋于无穷 lim(3x-5)/(x^3sin(1/x^2)) 其中x趋于无穷 X趋于无穷时,lim(2x+1/2x+3)^(x-1)等于多少 lim(x趋于无穷)[(x+3)/(x^2-x)]*（sinx+2）,求函数极限 求lim(x^3(sin1/x-1/2*sin2/x)) x趋于无穷