Harry_the_cat
Elite Member
- Joined
- Mar 16, 2016
- Messages
- 3,697
I believe graphics calculators evaluate definite integrals using Simpson's rule.
When I try to evaluate \(\displaystyle \int_{0}^{\infty} 3xe^{-3x}dx \), putting in 100 as upper limit gives me the correct answer \(\displaystyle \frac{1}{3}\).
But if I put in 1000 as the upper limit, I get 3.19E-52. Can anyone explain what is going on behind the scenes and why the inconsistent answers?
When I try to evaluate \(\displaystyle \int_{0}^{\infty} 3xe^{-3x}dx \), putting in 100 as upper limit gives me the correct answer \(\displaystyle \frac{1}{3}\).
But if I put in 1000 as the upper limit, I get 3.19E-52. Can anyone explain what is going on behind the scenes and why the inconsistent answers?