parabola

parabola find the point on the parabola y=1-x2 at which the tangent line cuts from the first quadrant thetriangle with the smallest area. 英语翻译Express the following in the form Y=XkComplete the squares and hence sketch the parabola,showing the coordinates of the maximum or minimum turning point and the X- and Y- intercepts The graph in the xy-plane represented by x=3sint and y=2cost is :A.a circle B.an ellipse C.a hyperbola D.a parabola E.a line Q1:已知L1和L2互为垂直并且相交于点(4 3) 1：L1 过点（2 4）.求L1方程2：求L2的斜率3：写出L2的方程.Q2:a:Find the coordinates of the focus of the parabola y=X^2=X^2+8X+6B:find the equation of the parabola woth focus (2,3 and 2010年一月SAT数学题题是这样的：y=-2(x-2)^2+3In the xy-plane,line L passes through the point (4,-5) and the vertex of the parabola with the equation above.What is the slope of line a parabolic arch has a span of 120 feet and a maximum height of 25 feet.choose suitable rectangular coordinate axes and find the equation of the parabola.then calculate the height of the arch at points 10 feet,20 feet,and 40 feet from the centre. 帮忙看一道英文高中数学题,谢谢了!consider the square with verties (0,0) (0,1) (1,1) and (1,0). The parabola y= x^2 splits the squares into two unequal parts. Find the ratio of the area of the smaller part to the area of the larget part 几道SAT2物理题（英文）,1、In the Rotherford scattering experiments,the trajectory（轨道）of the alpha particles was in the shape of a(an):A.hyperbola（双曲线）B.parabola（抛物线）C.ciecleD.ellipse（椭圆）E.straight line 一道关于抛物线的问题在英语中的问题是：Which of the following might be the value of the discriminant of a parabola that lies entirely above the x-axis?1.-6 2.0 3.3 4.501.-6 ,谷歌翻译：以下哪项可能是一个抛物线完全 Find the volume of the solid whose base is the region in the xy-plane that is bounded by the parabola y = 4 - x^2 and the line y = 3x, while the top of thesolid is bounded by the plane z = x + 4. 一道简单的不等式数学题（英文好的进!）4.The region of the xy plane that satisfies y > x^2 or y > 0 is(A) a circle (B) a square (C) the region of the plane bounded by a parabola (D) a crescent-shaped region in the plane (E) the half o 英文应用题.A rectangle has its base on the x-axis and it's two upper corners on the parabola y=12-x^2.What is the largest possible area of the rectangle.答案写着长方形的高是12-x^2,底边2x请问高和底边是怎么来的? 英语翻译In the xy-coordinate plane,P and Q are different points that have the same y-coordinate and lie on the parabola whose equation is y=x^2-3x-40.What is the x-coordinate of the midpoint of PQ?