Determine the convergence of \sum_{n=1}^{+\infty}\int_0^{\frac{1}{n}}\frac{\sin x}{1+x}dx

simnelsbl4

simnelsbl4

Answered question

2022-02-26

Determine the convergence of
n=1+01nsinx1+xdx

Answer & Explanation

zahrkao8vm

zahrkao8vm

Beginner2022-02-27Added 10 answers

x0:sinx1+xx
Because, for all x0,
sin(x)x  and  11+x1
So
01nsin(x)1+xdx01nxdx=12n2
And n=11n2 is convergent.

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