dfrac (1)(3)f(x) C. -3f(x) D. -dfrac (1)(3)f(x)
设 (x)=(e)^-x, 则 int dfrac (f(ln x))(x)dx= .(x)=(e)^-x, 则 int dfrac (f(ln x))(x)
设f"(a)存在, (a)neq 0 ,则 lim _(xarrow a)[ dfrac (1)(f(a)(x-a))-dfrac (1)(f(x)-f(a))
dfrac (1)(2)f(0)
设f(x)=e^2x,则f(0)=()A. 1B. 0C. 8D. 2
[题目]-|||-设f(x)为连续函数,且 (x)=(int )_(dfrac {1)(x)}^ln xf(t)dt, 则F(x)等于 ()-|||-(A) d
设 (x,y)=dfrac ({x)^2+(y)^2}({e)^xy+xysqrt ({x)^2+(y)^2}} ,则 (f)_(x)(1,0)= __ _.
设 f(x)= e^x,则 f(x) 为 ().A. $\frac{1}{2}e^x$B. $e^{2x}$C. $e^x + c$D. $2e^x - 1$
设 f(x)= arctan e^x,则 f(x)= ( )。A. $\frac{e^x}{1 + e^{2x}}$B. $\frac{1}{1 + e^{2x
15 设f(a)存在,f(a)neq0.则lim_(xto a)[(1)/(f(a)(x-a))-(1)/(f(x)-f(a))]=____.15 设$f''(