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lbvjy [14]
3 years ago
12

Differentiate f(x)= square root of x times sin x

Mathematics
2 answers:
777dan777 [17]3 years ago
8 0
Here is the answer of the given mathematical problem above:
In order to differentiate f(x)= square root of x times sin x, you do this.
Use the product rule so that f′(x)=f(x)g′(x)+f′(x)g(x) when f(x)=x√ and<span>g(x)=sin(x)
</span>Next, solve for the derivative of sqrt(x) and sinx first and then plug into the equation for the product rule.
The result would be <span>the derivative of sqrt(x) is 1/2x^-1/2 and </span><span>derivative of sinx is cosx.</span>
zysi [14]3 years ago
3 0
Hello,

y= \sqrt{ x*sin(x) } \\&#10;&#10;y'= \dfrac{sin(x)+x*cos(x)}{2 \sqrt{x*sin(x)} }
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The following observations are given for two variables. x y 2 7 6 10 9 13 11 18 11 21 12 25 7 12 4 7 ​ a. Compute the sample cov
belka [17]

Answer:

The given data is:

x = (2, 7, 6, 10, 9, 13, 11, 18)

y = (11, 21, 12, 25, 7, 12, 4, 7)

a. The formula used for Sample Covariance is:

S_{XY}=\frac{\sum_{i=1}^{n}(X_{i}-\bar{X})(Y_{i}-\bar{Y})}{n-1}

where, \bar{X} is mean of X

and \bar{Y}  is mean of Y

Firstly calculating \bar{X} and \bar{Y}. We get,

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\bar{Y} = 12.375

Now, Putting all values in above formula. We get,

Sample Covariance S_{XY} = -8.64

b. Standard Deviation is the square root of sum of square of the distance of observation from the mean.  

Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}} }

where, \bar{x} is mean of the distribution.

Using formula we get,

Standard deviation (\sigma_{X}) = 4.81

c. Using above formula we get,

Standard deviation (\sigma_{Y}) = 7.21

d. Correlation Coefficient is calculate by using formula:

r_{xy}=\frac{S_{XY}}{S_{X}S_{Y}}

where, S_{XY} = Covariance of X and Y

S_{X} = Standard Deviation of X

S_{Y} = Standard Deviation of Y

Putting all values in above formula, we get,

Correlation Coefficient (r_{xy}) = -0.25

<em>Correlation Coefficient tell us that X and Y has negative week relationship whereas Sample Covariance tell us that X and Y has negative relationship. It does not tell us strength of relationship.</em>

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago
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vladimir1956 [14]
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