解析 B。对于二次函数的顶点式 y = a(x - h)^2 + k,其对称轴为 x = h。在函数 y = -2(x + 1)^2 - 3 中,h = -1,所以对称轴为 x = -1。选项 A,x = 1 不符合;选项 C,x = 3 不符合;选项 D,x = -3 不符合。反馈 收藏 ...
What is the equation for the axis of symmetry of a quadratic function y = 3x² + 6x + 2? A. x = -1 B. x = -2 C. x = -3 D. x = -4 相关知识点: 试题来源: 解析 A。解析:For the function y = 3x² + 6x + 2, a = 3 and b = 6. Using the formula x = -b/...
试题来源: 解析 A。对于二次函数 y = ax² + bx + c,对称轴公式为 x = -b/2a,在 y = 2x² - 4x + 3 中,a = 2,b = -4,代入公式可得 x = -(-4)/(2*2)=1。B、D 选项不符合对称轴公式。C 选项不是该函数对称轴。反馈 收藏 ...
The axis of symmetry for the quadratic function y = 3x^2 + 6x - 2 is: A. x = -1 B. x = 1 C. x = -2 D. x = 2 展开 初三英语二次函数单选题30题 The axis of symmetry for the quadratic function y = 3x^2 + 6x - 2 is: 查看试卷及答案 相关搜索 1 数学八下十六章至...
What is the axis of symmetry for f(x) = -2x^2 + 20x - 42? Axis of Symmetry of a Quadratic Function The graph of a quadratic function is parabolic which opens whether up or down. A line that divides this parabolic curve into two equal halves is known as the six of symme...
百度试题 结果1 题目 7. Given x =4 is the axis of symmetry of the graph of the quadratic function f(x) =7 + 8x-x2,determine the coordinates of the maximum point. 相关知识点: 试题来源: 解析 (4 , 23) 反馈 收藏
Learn the concept of the axis of symmetry of a geometrical shape. Understand the formula for finding the equations of the axis of symmetry & vertex...
Axis of Symmetry, Axis of Symmetry Definition, What is axis of symmetry? Axis of symmetry formula, Axis of symmetry equation, How to find axis of symmetry?
How to Find the Axis of Symmetry From the General Form of the Equation of a Parabola Step 1:Determine theaandbvalues from the general form of the quadratic equation that we are given. Step 2:Substitute theaandbvalues into the equation {eq}x=\dfrac{-b}{2a} {/eq}. ...
I believe x=-b/2a is the axis of symmetry, not y=-b/2a, as you explain. Report 01/10/14 Steve S. One way to remember this is with the Quadratic Formula: x = (-b±√(b^2-4ac))/2/a = -b/2/a ±√(b^2-4ac))/2/a The roots are equal distances from the value x ...