I've got a little trouble with my calc. The problem appears when I try to derivate a number I don't get the value I'm expecting to get.
For example. I tried a simple thing like nDeriv(X^5,X,2) and the calculator displayed 80,0004. Where does the 0004 come from?
When I did the same thing with X^6 it showed me 192.0016. Can anybody tell me what's wrong with it?
there is nothing wrong with it, the calculator takes a different approach towards stuff like integration or differentiation etc…so ALL THE ANSWERS BY A CALCULATOR ARE NOT EXACT
except for very simple functions like division, multiplication etc, the rest are taken to be a brute force or graphical approach, leading to INEXACT ANSWERS…Dun worry, there is nothing wrong with your calculator
nt sure if u have taken ur a levels or any exam involving the use of a GC, however, when the quetions asks for "exact answers"…using the direct answer by the GC will simply cause u to lose the mark, wat u can do however is to use th GC to smart guess the answer, for example if the GC gives u 80.0004, u can probably guess dat the string of digits 0004 behind is insignificant n due to inaccuracy…so u can just write 80
HOWEVER, NEVER USE THE DIRECT ANSWER BY THE GC FOR COMPLEX EXPRESSIONS…ELSE ULL LOSE THE MARK