Math Problem Statement

f(x) = -3x^2+1

Solution

The given function is f(x)=3x2+1f(x) = -3x^2 + 1. This is a quadratic function, and it represents a parabola that opens downwards because the coefficient of x2x^2 is negative.

Key Features of the Function:

  1. Vertex: The vertex form of a quadratic function is f(x)=a(xh)2+kf(x) = a(x - h)^2 + k, where (h,k)(h, k) is the vertex. In this case, the vertex occurs at x=0x = 0, and the function simplifies to f(0)=3(0)2+1=1f(0) = -3(0)^2 + 1 = 1. Thus, the vertex is (0,1)(0, 1).
  2. Axis of Symmetry: The axis of symmetry is the vertical line that passes through the vertex, x=0x = 0.
  3. Direction: Since the coefficient of x2x^2 is negative, the parabola opens downward.
  4. Y-intercept: The y-intercept occurs when x=0x = 0, so f(0)=1f(0) = 1. Therefore, the y-intercept is (0,1)(0, 1).
  5. X-intercepts: To find the x-intercepts, set f(x)=0f(x) = 0 and solve for xx: 3x2+1=0x2=13x=±13=±33-3x^2 + 1 = 0 \quad \Rightarrow \quad x^2 = \frac{1}{3} \quad \Rightarrow \quad x = \pm \sqrt{\frac{1}{3}} = \pm \frac{\sqrt{3}}{3} So, the x-intercepts are (33,0)\left( \frac{\sqrt{3}}{3}, 0 \right) and (33,0)\left( -\frac{\sqrt{3}}{3}, 0 \right).

Would you like more details on any of these features or have any questions?

Here are 5 related questions to expand on this:

  1. How do you convert the quadratic function to vertex form?
  2. Can you explain how to calculate the vertex of a parabola algebraically?
  3. How would this graph change if the coefficient of x2x^2 was positive?
  4. What is the range of the function f(x)=3x2+1f(x) = -3x^2 + 1?
  5. How do you calculate the domain of any quadratic function?

Tip: For any quadratic function, the domain is always all real numbers (,)(-\infty, \infty), but the range depends on whether the parabola opens upwards or downwards.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Parabolas

Formulas

f(x) = ax^2 + bx + c
Vertex form: f(x) = a(x - h)^2 + k
Axis of symmetry: x = -b / 2a

Theorems

Properties of Quadratic Functions
Symmetry of Parabolas

Suitable Grade Level

Grades 9-12