Length(<Function>,<Start Point>, <End Point>) trouble
I cannot get the Length(<Function>, <Start Point>, <End Point>) command to work. For example (v 6.0.609.0 offline):
I know that points C and D are on function f, yet when I input the command, I get a "Sorry, something went wrong. Check your input." error message. I know the Distance command is an alternative. It is my (albeit noob) understanding that command will not measure along function f, it will calculate the shortest distance. I'd prefer a command that reassures my students it measured along f since that was a specified parameter.
Thank you for your time.