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sqrt(x)*cos(x)

Sum of series sqrt(x)*cos(x)



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The solution

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  10              
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  \     ___       
  /   \/ x *cos(x)
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x = 1             
$$\sum_{x=1}^{10} \sqrt{x} \cos{\left(x \right)}$$
Sum(sqrt(x)*cos(x), (x, 1, 10))
The rate of convergence of the power series
The answer [src]
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2*cos(4) + 3*cos(9) + \/ 2 *cos(2) + \/ 3 *cos(3) + \/ 5 *cos(5) + \/ 6 *cos(6) + \/ 7 *cos(7) + \/ 10 *cos(10) + 2*\/ 2 *cos(8) + cos(1)
$$3 \cos{\left(9 \right)} + \sqrt{10} \cos{\left(10 \right)} + \sqrt{3} \cos{\left(3 \right)} + 2 \cos{\left(4 \right)} + \sqrt{2} \cos{\left(2 \right)} + 2 \sqrt{2} \cos{\left(8 \right)} + \cos{\left(1 \right)} + \sqrt{5} \cos{\left(5 \right)} + \sqrt{7} \cos{\left(7 \right)} + \sqrt{6} \cos{\left(6 \right)}$$
2*cos(4) + 3*cos(9) + sqrt(2)*cos(2) + sqrt(3)*cos(3) + sqrt(5)*cos(5) + sqrt(6)*cos(6) + sqrt(7)*cos(7) + sqrt(10)*cos(10) + 2*sqrt(2)*cos(8) + cos(1)
Numerical answer [src]
-3.88767384321770178366611843203
-3.88767384321770178366611843203
The graph
Sum of series sqrt(x)*cos(x)

    Examples of finding the sum of a series