设lim[(x+2a)/(x-a)]^x=8,则a=__.(x趋于无穷)我知道百度的解是(x+2a)/(x-a)=1+3a/(x-a)lim[(x+2a)/(x-a)]^x=lim {[1+3a/(x-a)]^(x-a)/3a}^3ax/(x-a)=e^3a=83a=3ln2a=ln2但是lim {[1+3a/(x-a)]^(x-a)/3a}^3ax/(x-a)为什么=e^3a啊好着急lim {[1+3a

设lim x趋于无穷（x-2/X+2a)=2,则常数a=? 设函数f(X)=x^2,则lim(x->a)(f(x)-f(a))/(x-a)=? 设f(x)为连续函数,a≠0,F(x)=(x^2/x-a)∫(x->a)f(t)dt,则lim(x->a)F(x)等于 设lim x趋于∞（x-2/X+2a)^x=2,则常数a=? 设极限lim(x平方-2x+a)/x-3 =5 ,x趋近于3,求a 设函数f(x)在x=0点的左右极限都存在,则下列等式中正确的是：（）A:lim f(x)=lim f(-x)x->0+ x->0-B:lim f(x^2)=lim f(x)x->0 x->0+C:lim f(|x|)=lim f(x)x->0 x->0+D:lim f(x^3)=lim f(x)x->0 x->0+ 设lim[(x^2+2x+3)^1/2-ax]=b,求a,b 设lim(x→1)sin(x∨2-1)/x∨3-a=2/3.求a 设当x->0,lim((ln(1+f(x)/x))/(a^x-1))=A,(a>0,a不等于1),求当x->0,lim(f(x)/x^2) lim(x→0)(a^2x-1)/4x 设f(x),当x=0时f(x)=2x+a,若极限lim(x趋近0）f(x)存在,则a等于什么? 设fx在[a,a+1)连续,则lim(x->a+)x^2/(x-a)定积分(a到x)f(t)dt= 设limf(x)=A,且A>0,证明lim根号f(x)=根号A 设lim（(x^2+1)/(x+1) -ax-b）=0,求a,b.x趋向无穷大 设lim（(x^2+1)/(x+1) -ax-b）=0,求a,b. x趋向无穷大 设lim(x->无穷大)((1+x^2+x^3)^1/3-ax-b)=0,求a= ,b= . 设x趋于1时lim[(x-1)/(2x^3+ax+b)]=1/4,求常数a,b. 设lim[(x+2a)/(x-a)]^x=8,则a=__.(x趋于无穷)我知道百度的解是(x+2a)/(x-a)=1+3a/(x-a)lim[(x+2a)/(x-a)]^x=lim {[1+3a/(x-a)]^(x-a)/3a}^3ax/(x-a)=e^3a=83a=3ln2a=ln2但是lim {[1+3a/(x-a)]^(x-a)/3a}^3ax/(x-a)为什么=e^3a啊好着急lim {[1+3a