Math Problem Statement
Diketahui parabola dengan persamaan f(x) = x^2 - 2x + 3. Jika diperhatikan, Parabola tersebut akan terbuka ke atas dengan sumbu simetri di sebelah kanan sumbu y. Parabola memotong sumbu y di (0, 3) dan parabola tidak memotong sumbu x. Grafik fungsi tersebut mempunyai nilai minimum y = 2.
Solution
The image shows a problem related to the properties of a parabola, given by the function . Let's break down the information:
- The equation of the parabola is , which is a quadratic function.
- The problem provides several properties of this parabola:
- The parabola opens upwards ("atas"), which is indicated by the positive coefficient of in the quadratic function.
- The axis of symmetry is on the right ("kanan") of the y-axis. This is determined by the vertex's x-coordinate.
- The parabola intersects the y-axis at the point , which is found by evaluating .
- The parabola does not intersect the x-axis ("tidak memotong sumbu x"), meaning it has no real roots (discriminant is negative).
- The graph has a minimum value of , which is the y-coordinate of the vertex.
Explanation:
- Opening Direction: The parabola opens upwards because the coefficient of is positive.
- Axis of Symmetry: The formula for the axis of symmetry is , where and . This gives , meaning the axis of symmetry is at , to the right of the y-axis.
- Vertex: The y-coordinate of the vertex is calculated by substituting into the equation. , so the vertex is .
- Intersection with y-axis: The y-intercept occurs at , giving , so the point is .
- No x-axis intersection: The discriminant is , which is negative, indicating no real roots and no x-intercepts.
Would you like a detailed breakdown of any of these points?
Related Questions:
- How do we find the vertex of a parabola using its equation?
- Why does the parabola open upwards in this case?
- How can we determine whether a parabola has real roots?
- What is the role of the discriminant in quadratic functions?
- Can you explain how to find the axis of symmetry?
Tip:
To determine the direction of a parabola's opening, always check the sign of the coefficient of . A positive sign means the parabola opens upwards, and a negative sign means it opens downwards.
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Math Problem Analysis
Mathematical Concepts
Algebra
Quadratic Functions
Graphing Parabolas
Formulas
Quadratic function: f(x) = ax^2 + bx + c
Vertex form: x = -b / 2a
Discriminant: Δ = b^2 - 4ac
Theorems
Quadratic formula
Properties of parabolas: axis of symmetry, vertex, and intercepts
Suitable Grade Level
Grades 8-10