HP 50g Limit Help

[jebem]

(02-23-2017 05:59 AM)Carsen Wrote:  I cannot get my HP 50g to find the limit as X approaches 0 when...

f(x)=(cos(x)-1+(1/2)*x^2)/x^4.

When I try to solve it on the calculator, regardless if in AOS or RPN, I always get the response "Insufficient order" from the calculator and puts a "?" as my answer. I know the problem has an answer because I solved it by hand. The answer is 1/24.

A little off topic, but my HP Prime came out with the correct answer on both environments (Home and CAS), by just typing your function.
I know it's not a RPL machine and it doesn't have the 50G heritage, but it's a HP as well and highly oriented to the education market.