VCE General & Further Maths Question Thread!

[stevie.lowe28]

Can someone help me with matrices question 6 from the multie choice exam?

[QTPi]

Can someone help me with matrices question 6 from the multie choice exam?

(i) referred to the number of the row, (j) referred to the number of the column and when the 2 numbers were added they would equal to the number it was representing, for example row 1 coloumn 1 should be representing the number 2 as 1 plus 1 clearly equals 2, as well row 3 column  2 would be 5 as 2 plus 3 equal 5. I hope that helps

[rudytay]

I got a 38/40 on exam 1. How many marks can I afford to drop on exam 2 to get a 40+ SS?
 

[abcdefg9999]

Of 2014 exam 1, is D a correct answer for question 9 of number patterns?

[Splash-Tackle-Flail]

Ok, for exam 2, when we are dealing with questions that have a) b) c) d), in Geometry and Trig, if we find the answer to say question a) which gives an answer of root 2, but wants it to one decimal place, so we write 1.4 cm, then if in the next part b) they ask us to calculate something that requires that length, do we use 1.4 (the answer to part a but rounded to 1 dp) or do we keep using root 2? For example in the TSSM 2014 exam paper it seems they have used the rounded answer for further calculations instead of the actual answer.

[Dan1995]

Ok, for exam 2, when we are dealing with questions that have a) b) c) d), in Geometry and Trig, if we find the answer to say question a) which gives an answer of root 2, but wants it to one decimal place, so we write 1.4 cm, then if in the next part b) they ask us to calculate something that requires that length, do we use 1.4 (the answer to part a but rounded to 1 dp) or do we keep using root 2? For example in the TSSM 2014 exam paper it seems they have used the rounded answer for further calculations instead of the actual answer.

If it says "using your answer from part a, find..." Then you would use the rounded answer, exactly as it is written above. Otherwise always use the exact answer, such as root 2.

[Splash-Tackle-Flail]

Thanks, and What about in a show that question? because people who don't get it will have to use the rounded answer?

[Dan1995]

Thanks, and What about in a show that question? because people who don't get it will have to use the rounded answer?

If it's a show that question then I would say use that, because technically you have been given the exact length by the exam writers, so you should use that in any calculations you do.

[Splash-Tackle-Flail]

Thank you! I have one more question if it isn't too much of a bother! If they ask us for the mode of a set of data values, but there is a maximum frequency for two data values, do we say both of those values are the mode, and/or state the data is bimodal? What if there are 3 data values with the same maximum frequency? Or would we say there is no mode?

[Dan1995]

Thank you! I have one more question if it isn't too much of a bother! If they ask us for the mode of a set of data values, but there is a maximum frequency for two data values, do we say both of those values are the mode, and/or state the data is bimodal? What if there are 3 data values with the same maximum frequency? Or would we say there is no mode?

List all of the values that are equal most frequent, if there is more than one then list more than one. Not necessary to say that it is bimodal, but you wouldn't lose marks by doing so.

[Splash-Tackle-Flail]

Thank you very much!

[aejays]

Hey guys, just a few questions about nit picky ways to lose marks:

When we're required to give rounded answers, do we first have to indicate something like x = 35.235... ≈ 35.24
or can we just say  x = 35.24 and do we actually need to use '≈' ?

For 'show that' questions, do we need to write formulas out?

'Approximately symmetric' and 'normal distribution' mean the same thing right?

[Zealous]

When we're required to give rounded answers, do we first have to indicate something like x = 35.235... ≈ 35.24
or can we just say  x = 35.24 and do we actually need to use '≈' ?

No need to show the approximation symbol. They won't be picking on you for that sort of stuff. Just make your final answer very clear with an underline or box.

For 'show that' questions, do we need to write formulas out?

"Show that" questions: show a crazy amount of working out to be safe. Don't risk showing too little, you won't be penalised for showing too much working out. So if it's geometry using the cos rule to find a longer length, show each step of the working out (use less calculator). See http://www.vcaa.vic.edu.au/Documents/exams/mathematics/2009furmath2-w.pdf Geometry and Trig Q3a,b for some "show that" questions (not sure if they're in other modules); then see the assessment report to see what steps were necessary.

'Approximately symmetric' and 'normal distribution' mean the same thing right?

Yep. They both refer to bell curves in further.

[Zues]

just a question say i found the answer to length AD to be 37.44 and answer says to nearest metre so i write 37m. In the next question it ask me to find BX, and to find BX i need to use AD, do i use the 37.44 or 37?

[Dan1995]

just a question say i found the answer to length AD to be 37.44 and answer says to nearest metre so i write 37m. In the next question it ask me to find BX, and to find BX i need to use AD, do i use the 37.44 or 37?

Unless it clearly says "using your answer from above" use the exact answer, not the rounded answer.