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Topic: How teaching factors rather than multiplicand & multiplier
confuses kids!

Replies: 32   Last Post: Nov 17, 2012 11:13 AM

 Messages: [ Previous | Next ]
 Joe Niederberger Posts: 4,239 Registered: 10/12/08
Re: How teaching factors rather than multiplicand & multiplier
confuses kids!

Posted: Nov 13, 2012 11:52 AM

Gary Tupper writes:
>Consider the function:
F: y= x^2 if x is rational; -x^2 if x is irrational
Appears to be continuous at a single point (0,0) only. Can be drawn
without lifting the pencil - as long as the pencil stays still.

Come again? Do you mean -(x^2)? And by "pencil stays still" are you referring to retracing? If we are being that literal how does one get the pencil to go to infinity and back? Nice trick though.

Joe N

Date Subject Author
11/12/12 kirby urner
11/12/12 Robert Hansen
11/12/12 kirby urner
11/12/12 kirby urner
11/12/12 Robert Hansen
11/12/12 kirby urner
11/12/12 Robert Hansen
11/12/12 kirby urner
11/12/12 Robert Hansen
11/13/12 Joe Niederberger
11/13/12 Robert Hansen
11/13/12 Robert Hansen
11/13/12 Joe Niederberger
11/13/12 Joe Niederberger
11/13/12 Joe Niederberger
11/14/12 Robert Hansen
11/14/12 kirby urner
11/15/12 kirby urner
11/15/12 Robert Hansen
11/15/12 kirby urner
11/15/12 Robert Hansen
11/16/12 kirby urner
11/16/12 Robert Hansen
11/16/12 kirby urner
11/15/12 Joe Niederberger
11/15/12 Robert Hansen
11/16/12 Joe Niederberger
11/17/12 Robert Hansen
11/16/12 Joe Niederberger
11/17/12 Robert Hansen
11/16/12 Joe Niederberger
11/17/12 Robert Hansen