设三阶矩阵 =(alpha ,gamma 1,(y)_(2)), =(beta ,gamma 1,(gamma )_(2))其中 =(alpha ,gamma 1,(y)_(2)), =(beta ,gamma 1,(gamma )_(2)) 均为 3 维列向量则=(alpha ,gamma 1,(y)_(2)), =(beta ,gamma 1,(gamma )_(2)) ==(alpha ,gamma 1,(y)_(2)), =(beta ,gamma 1,(gamma )_(2))=(alpha ,gamma 1,(y)_(2)), =(beta ,gamma 1,(gamma )_(2))=(alpha ,gamma 1,(y)_(2)), =(beta ,gamma 1,(gamma )_(2))=(alpha ,gamma 1,(y)_(2)), =(beta ,gamma 1,(gamma )_(2))

1 单选 (4分)极限 lim _(xarrow +infty )((1+x))^dfrac (1{x)}-|||-的值为 ()-|||-A.e-|||-B.1-|||-c.α0-|||-D. ^-1

4、单选 设A、B和C为n阶可逆矩阵，则错误的是. A (ABC)^T=A^TB^TC^T B (Apm B)^T=A.^Tpm B.^T; C. (AB)^T=B^TA^T D. (AB)^-1=B^-1A^-1;

标么值是指________________________和________的比值。

3.设二维随机变量(X,Y)在区域D=(x,y)|xgeq0,ygeq0,x+yleq1上服从均匀分布，求Z=X+Y的概率密度函数。

6.8.设f(x)连续可导, f(1)=1 ,G为不包含原点的单连通域,任取M, in G 在G内曲线积分-|||-(int )_(M)_(M)dfrac (1)(2{x)^2+f(y)}(ydx-xdy) 与路径无关,-|||-(1)求f(x);(2)求 int dfrac (1)(2{x)^2+f(y)}(ydx-xdy) ,其中T为 ^dfrac (2{3)}+(y)^dfrac (2{3)}=(a)^dfrac (2{3)} ,取正向.

设函数f(x)满足关系式f”(x)+[f’(x)]2=x,且f’(0)=0,则( )A. f(0)是f(x)的极大值。B. f(0)是f(x)的极小值。C. 点(0,f(0))是曲线y=f(x)的拐点。D. f(0)不是f(x)的极值,点(0,f(0))也不是曲线y=f(x)的拐点。

、单选 设曲线为 =((x-1))^2((x-3))^2,-|||-其极值点个数为 ()()-|||-(4分-|||-A 0-|||-B 3-|||-C 1-|||-D 2

17、单选 lim _(xarrow infty )dfrac (sin 3x+2x)(sin 2x-3x)-|||-A dfrac (1)(3)-|||-B -dfrac (1)(3)-|||-C -dfrac (2)(3)-|||-D dfrac (2)(3)

罗尔中值定理要求函数满足的三个条件是:闭区间连续,开区间可导,端点函数值相等.A. 对B. 错

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