高中数学-高考试题(上海交通大学 1931年矩阵)

问答题（1931年上海交通大学）

If w is one of the imaginary cute roots of unity, show that the square of

=

hence show that the value of the determinant on the left is 3.

答案解析

暂无答案

讨论

矩阵

Find the sum of the geometical series -2,,-1/3 to 6 terms.

Find the sum of the arithmetical series 49,44,39,… to 17 terms.

Find all the positive angles less than 360° which satisfy the equation:cos2x+cosx+1=0

Find the sum of n terms of the series whose nth term is 3(4n+4n²)-5n³.

Find the general term and the sum ofn terms of the series -3,-1,11,39,89,167.

Find the equation of the sphere which passes through (1,5,-3),(-3,0,0) which center on the 3x+y+z=0,x+2y +1 = 0.

Find the equation of the ruled surface whose generators are the system of the lines x-2y =4kx,k(x-2y)=4 and discuss the surface.

Find all the positive angles less than 380° which satisfy the equation sinx+sin2xsin3x = 0.

A motion picture film 120 feet long contains a certain number of individual pictures.If each picture were 0.1 of an inch shorter, the same film would contain 720 more pictures, how long is each picture?

Six persons throw for a stake, which is to be won by the one who first throws head with a coin: if they throw in succession, find the chance of the fourth person.

复数的运算

新高考Ⅱ复数的运算

若(1 + i) = 1 − i, 则 z =【】

复数1/(1-3i) 的虚部是【】

设复数z1 = 2 - i，z2 = 1 - 3i，则复数i/z1 + z2/5的虚部等于______.

已知z∈C，解方程zz ̅ - 3iz ̅ = 1+3i.

当z=-(1-i)/时，z100 + z50 + 1的值等于【】

设复数z=cosθ+isinθ(0<θ<π),ω=,已知|ω|=/3,argω<π/2,求θ.

如果复数z满足|z+i|+|z-i|=2，那么|z+i+1|的最小值是【】

已知z=1+i.(Ⅰ)设ω=z2+3z ̅-4，求ω的三角形式；(Ⅱ)如果=1-i，求实数a,b的值.

全国统考复数的运算

线性代数

若下式(x+p)(x+2q)+(x+2p)(x+q)为含有x的整平方式，则9p²-14pq+9q²=0.

试从x=by+cz,y=cz+ax,z=ax+by，消去x,y,z.求a,b,c间的关系式.

分解因式：x2-4xy+4y2-4z2.

甲乙两容器内都盛有酒精，甲有v1公斤，乙有v2公斤.甲中纯酒精与水（重量）之比为m1:n1，乙中纯酒精与水之比为m2:n2，问将二者混合后所得液体中纯酒精与水之比是多少？

将多项式x5y-9xy5分别在下列范围内分解因式：1. 有理数范围； 2. 实数范围；3. 复数范围．

如果n是正整数，那么1/8[1-(-1)n](n2-1)的值【】

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安徽省代数式

安徽省代数式

分解因式：a2-2ab+b2-6a+6b+5.