02-21-2016, 10:11 PM

When taking integral of (8x^2 + 26x + 15)/(2x^2 - x -15) from -5 to 0, I get out of domain error on the WP 34s. CASIO 9869gii and CLASSWIZ FX-991EX also fail. They all do fine if the lower start point is very close to -5 such as -5.0001. After fiddling around, I came to guess that this is due to denominator being undefined at X=-2.5, that one of the incremental dx' being added starts with -2.5

Is there an easy work around...

I was just about to submit, and realized that I could test this thought easily by adding 2 integrals where -2.5 would not likely be a starting point...I.e, integral from -5 to -3 plus integral from -3 to 0.

Works!

My ~62 year old mind isn't gone yet!

Is there an easy work around...

I was just about to submit, and realized that I could test this thought easily by adding 2 integrals where -2.5 would not likely be a starting point...I.e, integral from -5 to -3 plus integral from -3 to 0.

Works!

My ~62 year old mind isn't gone yet!