[职业资格类试卷]教师公开招聘考试(中学数学)模拟试卷37及答案与解析.doc

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1、教师公开招聘考试(中学数学)模拟试卷 37 及答案与解析一、选择题1 设全集=R,集合 A=x|x2+x 一 20,B=x|x 22x 一 3 ( )(A)一 2,1)(B) 一 2,3)(C) (1,3)(D)(一 1,12 已知 f(x)=(x+ex)dx,则 f(x)=( )(A)x+e x(B) x2+ex(C) +ex+C(D)x+e x+C3 计算 sin43cos13一 cos43sin13的结果等于( )4 行列式 则 x 为( )(A)0(B)一 2(C)一 7(D)一 145 已知数列a n中,若 2an=an1+an+1(nN*,n2),则下列各不等式中一定成立的是( )

2、A)a 2a4a32(B) a2a4a 32(C) a2a4a32(D)a 2a4a 326 有 5 本不同的书,其中语文书 2 本,数学书 2 本,物理书 1 本,若将其随机的并排摆放到书架的同一层上,则同一科目的书都不相邻的概率为( )7 已知 f(x)在a,b上可导,则 f(x)0,y0,k R,则有 x+y=xyR+,kx=x kR+封闭性得证(2)八条运算律x+(y+z)=x(yz)=(xy)z=(x+y)+zx+y=xy=yx=y+x1 是零元素 x+1=x1=x x+0=xx+0=x0=1 是 x 的负元素 x+y=0k(x+y)=(xy)k=xkyk=kx+ky数因子分配律(

3、k+l)x=x k+1=xkxl=(kx)+(lx)分配律k(lx)=(x l)k=xkl=(kl)x结合律 lx=xl=x 恒等律由此可证,R +是实数域 R 上的线性空间25 【正确答案】 由 Sn+Sn2=2Sn1+2n1(n3)得, Sn 一 Sn1=Sn1 一 Sn2+2n1(n3).又 a2a1=53=2(n2)an 一 an1=2n1 (n2)a n=(an 一 an1)+(an1 一 an2)+(a2 一 a1)+a1=2n1+2n2+21+3= +3=2n+1故数列a n的通项公式为 an=2n+126 【正确答案】 Tn=b1+b2+b3+bn27 【正确答案】 由(2)可知 若 Tnm,则化简得当 时,取 n0=1 即可当记 的整数部分为 s,取 n0=s+1 即可综上可知,对任意的 均存在 n0N*使得(2)中的 Tnm成立

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