高中数学-高考试题(上海交通大学 1931年代数式)

计算题（1931年上海交通大学）

Factor the following:

4a-16b+4a+1.

答案解析

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讨论

高中数学

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 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 plane passing through the line (x-x1)/a1 =(y-y1)/b1 =(z-z1)/c1 which is parallel to the (x-x2)/a2 =(y-y2)/b2 =(z-z2)/c2 .

Find the equation of the projection of the linex=z+2,y=2z-4 upon the plane x+y- z = 0.

Find the locus of the point of intersection of lines drawn through the foci of an ellipse parallel to conjugate diameters.

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Given the parabola y²=4x and the line x=2+ecosα,y=-4+ecosβ，find the condition which cosα and cosβ must satisfy if the line meets the parabola in but one point.

A boy standing cft. behind and opposite the middle of a foothall goal sees that the angle of elevation of the nearer is A and the angle of elevation of the farther one is B. Show that the length of the field is c(tanAcotB-1).

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线性代数

化简((x2-y2)(2x2-2xy))/4(x-y)2-xy/(x+y)

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英：If (1-x)n=c0+c1 x+c2 x2+⋯+cn xn, find the value of c0+2c1+3c2+⋯+(n+1) cn.汉：若(1-x)n=c0+c1 x+c2 x2+⋯+cn xn,求c0+2c1+3c2+⋯+(n+1) cn之值.

Factor the following expressions: a(b + c)² + b(c + a)² + c(a + b)² - 4abc

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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.

若 a² = ab,则a=b 对不对? 为什么?

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试分解(x²+x-3)/(x-1)(x-2)(x-3)为最简部分分式.

代数式

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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.

分解因式x2y - 2y3.

试分 ab(x²- y²)+ xy (a²-b²)为因数.

北京师范大学代数式

试将下列繁分数简单之：