Derivatives on HP 42S

08262018, 04:47 PM
Post: #21




RE: Derivatives on HP 42S
Hi Thomas,
The solver for dx=0 of some function fx, and then the running of fx to find f(x) of the extremum found by dx is quite successful. When I run dx for, say, pi/4 (let's be simple and use fx=sin x), I get ~0 instead of ~.707 Why is dx successful in solve, but not as a means to find dx of a specific x value? 

« Next Oldest  Next Newest »

User(s) browsing this thread: 1 Guest(s)