3.简答题-|||--|||-=2x-|||-.=3-(x)^2-|||- x

简答题19、解线性方程组}x_(1)+x_(2)+x_(3)+x_(4)=1 x_(1)+2x_(2)-x_(3)+3x_(4)=2 2x_(1)+3x_(2)

设=5(x)^3-(2)^x+3(e)^x+2，则=5(x)^3-(2)^x+3(e)^x+2=( ).A.=5(x)^3-(2)^x+3(e)^x+2

2.[简答题]计算极限 lim _(xarrow infty )dfrac ({(x-1))^10((2x-3))^10}({(3x-5))^20}

7.函数 (x,y)=dfrac (arcsin (3-{x)^2-(y)^2)}(x-{y)^2} 的定义域为7.函数 (x,y)=dfrac (arcsin

下列函数中哪一个是微分-|||-方程 -3(x)^2=0 的解( ) ()-|||-A =(x)^2-|||-B =-(x)^3-|||-C =-3(x)^2-

^2=9 的充要条件是 () [2分]-|||-A x=3 且 x=-3-|||-B x=3-|||-c x=-3-|||-D x=3 或 x=-3

1.简答题-|||-.lim _(xarrow 1)dfrac ({x)^2-2x+1}({x)^2-1}-|||-

=(e)^2x-|||-2. =(e)^-(x^2)-|||-3. =dfrac ({e)^x}(1+x)-|||-4. =dfrac (sqrt {(x+1)

13.(简答题) 求不定积分int((3+2lnx)^2)/(x)dx.13.(简答题) 求不定积分$\int\frac{(3+2lnx)^{2}}{x}dx$

(x)=dfrac (1)(3)(x)^3-(x)^2-8x+1的单调增加区间是( )(x)=dfrac (1)(3)(x)^3-(x)^2-8x+1(x)=d