To consider the results of the 15 experiments valid, they should be similar in at least 8 of the trials . So, option C is the right choice.
To determine the number of times the results should be similar for them to be considered valid, we need to establish a threshold based on the number of experiments conducted. In this case, the experiment was repeated 15 times.
To determine the minimum number of times the results should be similar for validity, we can calculate the majority. We divide the total number of trials by 2 and add 1. In this case, 15 divided by 2 equals 7.5, and adding 1 gives us 8.
Therefore, for the results to be considered valid, they should be similar in at least 8 out of the 15 trials. This threshold ensures that the majority of the experiments produced consistent results, indicating reliability and reproducibility.
Thus, The correct answer is option C.8
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1. X⁵-4x⁴-2x³-2x³+4x²+x=0
2. X³-6x²+11x-6=0
3. X⁴+4x³-3x²-14x=8
4. X⁴-2x³-2x²=0
Find the roots for these problem show your work
So the roots of the original equation are:
x = 0, x = 1 + √3, x = 1 - √3
Let's solve each of these equations and find their roots.
x⁵ - 4x⁴ - 2x³ - 2x³ + 4x² + x = 0:
To factorize this equation, we can factor out an "x" term:
x(x⁴ - 4x³ - 4x² + 4x + 1) = 0
Now, we have two factors:
x = 0
To find the roots of the second factor, x⁴ - 4x³ - 4x² + 4x + 1 = 0, we can use numerical methods or approximation techniques.
Unfortunately, this equation does not have any simple or rational roots. The approximate solutions for this equation are:
x ≈ -1.2385
x ≈ -0.4516
x ≈ 0.2188
x ≈ 3.4714
x³ - 6x² + 11x - 6 = 0:
This equation can be factored using synthetic division or by guessing and checking.
One possible root of this equation is x = 1.
By performing synthetic division, we can obtain the following factorization:
(x - 1)(x² - 5x + 6) = 0
Now, we have two factors:
x - 1 = 0
x = 1
x² - 5x + 6 = 0
To find the roots of the quadratic equation x² - 5x + 6 = 0, we can use the quadratic formula:
x = (-b ± √(b² - 4ac)) / (2a)
In this case, a = 1, b = -5, and c = 6.
Substituting these values into the quadratic formula, we get:
x = (5 ± √(25 - 24)) / 2
x = (5 ± √1) / 2
x = (5 ± 1) / 2
So the roots of the quadratic equation are:
x ≈ 2
x ≈ 3
Therefore, the roots of the original equation are:
x = 1, x ≈ 2, x ≈ 3
x⁴ + 4x³ - 3x² - 14x = 8:
To solve this equation, we need to move all the terms to one side to obtain a polynomial equation equal to zero:
x⁴ + 4x³ - 3x² - 14x - 8 = 0
Unfortunately, this equation does not have any simple or rational roots. We can use numerical methods or approximation techniques to find the roots.
Approximate solutions for this equation are:
x ≈ -2.5223
x ≈ -0.4328
x ≈ 1.6789
x ≈ 3.2760
x⁴ - 2x³ - 2x² = 0:
To solve this equation, we can factor out an "x²" term:
x²(x² - 2x - 2) = 0
Now, we have two factors:
x² = 0
x = 0
x² - 2x - 2 = 0
To find the roots of the quadratic equation x² - 2x - 2 = 0, we can again use the quadratic formula:
x = (-b ± √(b² - 4ac)) / (2a)
In this case, a = 1, b = -2, and c = -2. Substituting these values into the quadratic formula, we get:
x = (2 ± √(4 - 4(1)(-2))) / (2(1))
x = (2 ± √(4 + 8)) / 2
x = (2 ± √12) / 2
x = (2 ± 2√3) / 2
x = 1 ± √3
So the roots of the original equation are:
x = 0, x = 1 + √3, x = 1 - √3
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