Math Problem Statement

how to graph this

Find the area of the region in QI bounded by the curve y = x^2 + 1, both axes, and the line x=2.

Solution

To graph this, we are dealing with a curve, axes, and a vertical line. Let's break it down:

1. Equation of the curve:

The given equation is: y=x2+1y = x^2 + 1 This is a parabola that opens upwards with its vertex shifted one unit upwards (because of the "+1" term). The vertex is at (0,1).

2. Boundaries:

  • The region is bounded by the x-axis (y=0y = 0) and the y-axis (x=0x = 0).
  • There's also a boundary at the vertical line x = 2.

3. Graphing steps:

  1. Plot the curve y=x2+1y = x^2 + 1:

    • At x=0x = 0, y=1y = 1.
    • At x=1x = 1, y=2y = 2 (since 12+1=21^2 + 1 = 2).
    • At x=2x = 2, y=5y = 5 (since 22+1=52^2 + 1 = 5).
  2. Plot the axes:

    • The x-axis is the horizontal line where y=0y = 0.
    • The y-axis is the vertical line where x=0x = 0.
  3. Draw the line x=2x = 2:

    • This is a vertical line passing through x=2x = 2 that intersects the curve at the point (2, 5).

4. Sketch the bounded region:

The region is bounded by:

  • The curve y=x2+1y = x^2 + 1 from x=0x = 0 to x=2x = 2,
  • The x-axis from x=0x = 0 to x=2x = 2,
  • The y-axis at x=0x = 0, and
  • The vertical line x=2x = 2.

The region in the first quadrant (QI) is enclosed by these elements.

Would you like me to generate a graph for this description or explain more details? Here are some questions to expand on this:

  1. How can you find the area under a curve using integration?
  2. What is the significance of the limits x=0x = 0 and x=2x = 2?
  3. How do you set up an integral to calculate the area under a parabola?
  4. What happens if the line x=2x = 2 is moved further right, say to x=3x = 3?
  5. How would the area change if the equation was y=x2y = x^2 (without the +1)?

Tip: To find the area under a curve, we often use definite integrals with the limits of the given region.

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Math Problem Analysis

Mathematical Concepts

Quadratic Functions
Area Under a Curve
Definite Integrals

Formulas

y = x^2 + 1
Area = ∫(y dx)

Theorems

Fundamental Theorem of Calculus

Suitable Grade Level

Grades 10-12