高中数学-高考试题(北京大学 1932年解方程)

计算题（1932年北京大学）

试解方程式 a(x+y)= b(x - y) = xy

答案解析

暂无答案

讨论

高中数学

Twos tations,A and B on opposite side of a mountain, are both visible from a third station C. The distance AC=3m.CB=5m and the angle ACB=60°. Find the distance between A and B.

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

Homologous sides of two similar polygons have the ratio of 5 to 9 , the sum of the areas is 212 sq. ft. Find the area of each figure.

If two circles tangent at C and a common exterior tangent touches the circles in A and B, the angle ACB is a right angle.

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.

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?

Factor the following:4(a-b)²-12(a-b)(e+9e²)

Factor the following:4a-16b+4a+1.

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.

解方程

已知2lgx+lg2=lg⁡(x+6)，求x.

求等式=125中x的值.

有甲、乙二书记，甲每写3页.乙能写4页，甲日写8点钟，10日之间已写 480页.问乙欲 15 日之力写完 720 页，每日须写几点钟.

武汉大学解方程

有甲、乙二列火车，甲列比乙列每点之速度多 15 里，如行36 里，则甲列比乙列先 12 分钟到，问甲、乙二列车之速度各几何.

英：If α,β,c are the roots of the equation x3-px2+qx-c=0, find the value of α2+β2+c2.汉：若α,β,c为x3-px2+qx-c=0的三个根，求 α2+β2+c2之值.

Solve the following equation by taking the steps performed in srriving at Cardann formulas, but do not formulas themselves: x³ - 15x² - 33x +847= 0.

武汉大学解方程

解方程x5-1=0.

解方程组，并详细讨论之.

函数

如果奇函数f(x)在区间[3,7]上是增函数且最小值为5，那么f(x)在区间[-7,-3]上是【】

根据函数单调性的定义，证明函数f(x)=-x3 + 1在(-∞,+∞)是减函数.

设函数f(x)=x2 + x + 1/2的定义域是[n,n+1]( n是自然数)，那么f(x)的值域中共有______个整数.

如图，图中曲线是幂函数y=xn在第一象限的图像.已知n取±2,±1/2四个值则相应于曲线C1,C2,C3,C4的n依次为【】

函数y=(ex - e-x)/2的反函数【】

如果函数f(x)=x2+bx+c对任意实数t都有f(2+t)=f(2-t)，那么【】

F(x)=(1+)f(x)(x≠0)是偶函数，且f(x)不恒等于零，则f(x)【】

设f(x) = 4x - 2x + 1，则f-1(0) = ________。

设函数f(x) = 1 - (-1≤x≤0),则函数y=f-1(x)的图像是【】

定义在(-∞,+∞)上的任意函数f(x)都可以表示成一个奇函数g(x)和一个偶函数h(x)之和,如果 f(x)=lg⁡(10x+1),x∈(-∞,+∞),那么【】