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Vilka [71]
2 years ago
6

Help!!

Mathematics
1 answer:
7nadin3 [17]2 years ago
4 0

The result of the integral \int\limits^2_0 {(2\cdot x + 3)\cdot f''(x)} \, dx based on the <em>incomplete</em> graph of f' is approximately 35.943. (Choice C)

<h3>Determination of an integral based on a graph and a given expression</h3>

Based on the information given on the figure, we have a set of points which resembles a <em>second order</em> polynomial, whose expression can be found by the fact that coefficients can be found by know three <em>distinct</em> points: (x_{1}, y_{1}) = (0, 1), (x_{2}, y_{2}) = (1, 2.718), (x_{3}, y_{3}) = (2, 7.389)

Then, we form the following system of linear equations:

c = 1 (1)

a + b + c = 2.718 (2)

4\cdot a + 2\cdot b + c = 7.389 (3)

The solution of this system is: a = 1.4765, b = 0.2415, c = 1. Then, the expression of the <em>first</em> derivative is:

f'(x) = 1.4765\cdot x^{2} + 0.2415\cdot x + 1 (4)

And the <em>second</em> derivative is:

f''(x) = 2.953\cdot x + 0.2415 (5)

Then, we have the following integral equation:

I = \int\limits^{2}_{0} {(2\cdot x + 3)\cdot (2.953\cdot x + 0.2415)} \, dx

I = \int\limits^{2}_{0} {(5.906\cdot x^{2}+9.342\cdot x +0.7245)} \, dx

I = 5.906\int\limits^{2}_{0} {x^{2}} \, dx  + 9.342\int\limits^{2}_{0} {x} \, dx + 0.7245\int\limits^{2}_{0} \, dx

I = \frac{5.906}{3}\cdot (2^{3}-0^{3}) + \frac{9.342}{2}\cdot (2^{2}-0^{2}) + 0.7245\cdot (2-0)

I = 35.882

This choice that is closest to this result is C. \blacksquare

To learn more on definite integrals, we kindly invite to check this verified question: brainly.com/question/22655212

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