ATAR Notes: Forum
Archived Discussion => 2010 => End-of-year exams => Exam Discussion => Victoria => Mathematical Methods CAS => Topic started by: Linkage1992 on November 08, 2010, 07:00:43 pm
-
For the volume question, I differentiated it correctly, equated it to 0, got the wrong value for x due to a silly error, and used this value to find the volume of the pyramid.
how many marks out of 4 would i get?
-
SHOULD BE:
1. For differentiating correctly.
2. For equating derivative to 0.
But who knows about VCAA.
I did the same exact thing as you :)
-
did you have to differentiate that by hand?
-I think differentiating
-Equating to zero for maximum
-finding x
-subbing back into volume for answer
the real question is, would you get consequentials for the next question if your volume was incorrect?
-
I differentiated using the calculator, and I asked about consequential's in another thread. It would be harsh if they didn't give them out, because then one minor error robs you of a whole 4 marks, rather than just 2.
-
I differentiated using the calculator, and I asked about consequential's in another thread. It would be harsh if they didn't give them out, because then one minor error robs you of a whole 4 marks, rather than just 2.
Robs you of 6 actually :( The next question needed the volume from the last question didn't it ?
-
Well, I was being optimistic and hoping I would get the first 2 marks of the working out the volume question. ...