[ dfrac {{e)^2}({(z-1))^2},1] =-|||-A e-|||-B dfrac (1)(e)-|||-C dfrac (e)(2)-|||-D dfrac (1)(2e)

3.若抛物线 =a(x)^2 与曲线 =ln x 相切,则 a= () () .-|||-(A) dfrac (1)(2e) (B)2e (C) dfrac (

f(x)= ({e)^4-dfrac (1)(3))-|||-dfrac (1)(2)(e)^4-|||-dfrac (1)(2)((e)^2-dfrac

(2)极限 lim _(xarrow infty )((1-dfrac {1)(2x))}^dfrac (x{2)}= () .-|||-(A)e (B) ^-

例 53、设函数 =a(x)^2 与 =ln x 相切,则a的值等于 ()-|||-A、 dfrac (1)(2e) B、 dfrac (1)(e) C、e D

dfrac (1)(2)pi (R)^2E-|||-D. sqrt (2)(R)^2E-|||-E. dfrac (pi {R)^2E}(sqrt {2)}

积分 (int )_(dfrac {1)(2)}^dfrac (1{2)}(e)^npi dz=________________.(int )_(dfrac {

2 , 1 B . 1 , 2 C . (x)=dfrac ({e)^x-1}(x), 1D . (x)=dfrac ({e)^x-1}(x), 2设函数，若当

[题目]设 (x)=sqrt (1+{ln )^2x} 则 (e)=()-|||-A、 dfrac (sqrt {2)}(4)-|||-B、 dfrac (sq

设alpha =(dfrac (1)(2),0,0,dfrac (1)(2)) ,=E-(alpha )^Talpha =E+2(alpha )^Talpha

lim _(narrow infty )(dfrac (1)({n)^2+(e)^-1+1}+dfrac (2)({n)^2+(e)^-2+2}+dfrac (