All of these integrals have lower bounds of 0 and upper bounds of infinity:(adsbygoogle = window.adsbygoogle || []).push({});

Problems 1 and 2 just require me to determine whether it converges or diverges. 3 and 4 actually require a value.

1) e^(-x) * sqrt(x)

2) [tex]\frac{x*arctan(x)}{(1+x^4)^(1/3)}[/tex]

3) e^(-x) / sqrt(x)

4) x^2 * e^[-(x^2)]

I tried to use integration by parts but I went in circles

[Edit:] number 2 should have (1+x^4)^(1/3) in the denominator

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Tricky Integrals

**Physics Forums | Science Articles, Homework Help, Discussion**