Question

Compute the value of the improper integral. (If the integral diverges to $infty$, type oo; if it diverges to $-infty$, type -oo; if it diverges for some other reason, type DNE.) $int_{1}^{infty} frac{3}{1 + x^2} dx =$ Use the value of the improper integral to determine whether or not the series $sum_{n=1}^{infty} frac{3}{1 + n^2}$ converges or diverges. Enter C if the series is convergent, D if the series is divergent, and ? if the Integral Test does not apply:

          Compute the value of the improper integral. (If the integral diverges to $infty$, type oo; if it diverges to $-infty$, type -oo; if it diverges for some other reason, type DNE.)
$int_{1}^{infty} frac{3}{1 + x^2} dx =$
Use the value of the improper integral to determine whether or not the series $sum_{n=1}^{infty} frac{3}{1 + n^2}$ converges or diverges. Enter C if the series is convergent, D if the series is divergent, and ? if the Integral Test does not apply:

$Compute the value of the improper integral. (If the integral diverges to infty, type oo; if it diverges to -infty, type -oo; if it diverges for some other reason, type DNE.) int1^infty frac31 + x^2 dx = Use the value of the improper integral to determine whether or not the series sumn=1^infty frac31 + n^2 converges or diverges. Enter C if the series is convergent, D if the series is divergent, and ? if the Integral Test does not apply:$

Added by Noelia B.

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