tag:blogger.com,1999:blog-8722640913234461773.post4206399207948315217..comments2024-03-22T19:34:16.304+11:00Comments on exzuberant: Two ideas for introducing functionsenzuberhttp://www.blogger.com/profile/15258424253649444449noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-8722640913234461773.post-39301975802207116812017-06-15T02:37:43.463+10:002017-06-15T02:37:43.463+10:00That video is horrible! I wouldn't show that ...That video is horrible! I wouldn't show that to my class. It sounds like a chainsaw cutting up poor chickens/other animals.Math Girlhttps://www.blogger.com/profile/04727317336859750124noreply@blogger.comtag:blogger.com,1999:blog-8722640913234461773.post-40963191383405906222013-08-04T11:01:26.358+10:002013-08-04T11:01:26.358+10:00Great observation Kate!
I do note with sadness th...Great observation Kate!<br /><br />I do note with sadness that many calculators don't seem to have a 1/ x button. Instead they use the shift/function button to access an x^-1 functionality above a proper button. Lots of reasons I think this is unfortunate, most importantly, having such an obvious 1/x button encourages students to use multiplicative inverse as part of thinking through calculations involving division. (Bring back RPN! :-)enzuberhttps://www.blogger.com/profile/15258424253649444449noreply@blogger.comtag:blogger.com,1999:blog-8722640913234461773.post-80132200229573218682013-08-04T10:18:55.815+10:002013-08-04T10:18:55.815+10:00For most kids, younger ones anyway, you could do t...For most kids, younger ones anyway, you could do the same thing with the 1/x button/function. <br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8722640913234461773.post-48711702200850451312012-02-24T08:26:06.226+11:002012-02-24T08:26:06.226+11:00The ln() investigation - A great 'low floor-hi...The ln() investigation - A great 'low floor-high ceiling' task!<br /><br />I think that I'll probably do it with the log() function since I think they'll find it easier to see and understand the connection with exponents.<br /><br />Thank you for this post.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8722640913234461773.post-54787648083037921922012-02-22T22:11:19.345+11:002012-02-22T22:11:19.345+11:00Ooh - a rich treasure awaits! Actually - this is a...Ooh - a rich treasure awaits! Actually - this is a good start. Fire up GeoGebra. Go to the input bar at the bottom left, type in "ln(x)" and press return. You should see the graph. Now explore moving around, zooming in and out. You can right click on an empty area to change scale, or you can hold down the ctrl key which hovering on an axis, then drag. If it would help, I could make a video clip next time I get some hours free.enzuberhttps://www.blogger.com/profile/15258424253649444449noreply@blogger.comtag:blogger.com,1999:blog-8722640913234461773.post-56838964510717527732012-02-22T20:39:01.196+11:002012-02-22T20:39:01.196+11:00Yeah gday.
Nice idea. I've hardly used geogebr...Yeah gday.<br />Nice idea. I've hardly used geogebra - if you want to write a couple of hundred words about how to make geogebra draw this graph (from a table of values? or as a continuous function?) I'd be mighty grateful - and promise to try it out.<br />Cheers,<br />@bewdyroosterbewdyroosterhttps://www.blogger.com/profile/14949260128987425367noreply@blogger.com