no spell check on IE. Stupid computer labs...firefox catches these mistakes.

 

I'm not that far up Atleast now I know h:

 

thats what you get for failing spelling, need a machine to fix your mistakes hfawk:

 

whoever dicided to spell it with a "y" instead of an "i" is a *** for doing it wrong.

 

a) correct answer
b) presented in a way you can understand
= red-x wins this thread

 

Thanks Red X, your explanation was good. I did it a bit differently though:


x²(72-4x)

2x (72-4x) + x² (-4)

144x - 8x² - 4x²

144x - 12x²

12x(12-x)

I totally forgot about the product rule for derivatives.

 

TI-89 was made specifically to meet the calculator standards that the voyager and 92 wouldn't pass... internally it's the same

Voyager/92 are considered computers because of the qwerty

I think the speed/memory of the calc goes something like:

89 titanium>92+>89-HW2>92>89-HW1>voyager

been a while but I think thats the order

 

Actually you did it exactly like how I did it

Yeah you could be right, I only chose TI-92+ for the qwerty -- no more catalog searching for functions

Plus i got it on egay for $45

 

I meant titanium not platinum haha TI-89 Titanium is what I have h:

 

lol

And here I was thinking it was diamond encrusted and shit.