Math Problem Statement
Solution
We are given a graph of , the derivative of , and we need to find and . Additionally, we know that .
To solve this, we will use the Fundamental Theorem of Calculus, which states:
Thus, to find and , we will integrate over the respective intervals. This will require calculating the areas under the curve of , with the convention that areas above the -axis contribute positively and areas below the -axis contribute negatively.
Finding :
- From to , we integrate the graph of .
- The graph includes a semicircle and a triangle.
- The semicircle has a radius of 1 and is above the x-axis (centered at ).
- The triangle between and is also above the x-axis.
Step-by-step:
-
Semicircle (from to ):
- Area of a semicircle is , where , so this gives us:
-
Triangle (from to ):
- The triangle has a base of 2 (from to ) and a height of 2.
- Area of the triangle is:
Thus, the total area from to is:
Now, using the fundamental theorem, we have:
Finding :
- From to , we again integrate the graph of .
- This corresponds to two line segments, both below the x-axis.
Step-by-step:
-
Line segment from to :
- This is a straight line with a slope of -1, forming a triangle with base 1 and height 1 below the x-axis.
- The area of the triangle is:
- Since it's below the x-axis, the area is .
-
Line segment from to :
- This is a triangle with a base of 1 and height of 1 below the x-axis.
- The area is again , but negative:
Thus, the total area from to is:
Now, using the fundamental theorem:
Final answers:
Would you like further details or have any other questions? Here are some related questions you might explore:
- What if the semicircle had a different radius? How would that affect ?
- How do we apply the Fundamental Theorem of Calculus to other types of graphs?
- Can we find the maximum or minimum values of using this graph?
- What happens if we reverse the limits of integration?
- How would the calculation change if had discontinuities?
Tip: When integrating graphically, always pay attention to the areas above and below the x-axis to determine the net contribution.
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Math Problem Analysis
Mathematical Concepts
Integral Calculus
Geometric Area Under Curve
Fundamental Theorem of Calculus
Formulas
g(x) = g(0) + \int_0^x g'(t) dt
Area of semicircle = \frac{1}{2} \pi r^2
Area of triangle = \frac{1}{2} \cdot base \cdot height
Theorems
Fundamental Theorem of Calculus
Suitable Grade Level
Undergraduate Calculus
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