Methods 2009 Exam 1 Suggested Solutions

[Gloamglozer]

For the expected value function, I left it as 12/10 instead of reducing it to 6/5 or 1.2.  Does anyone know if I'll lost an answer mark for that?

[YT_17]

Hey, sorry itute answer has 1b simplified......that means u need to simplify?

[steph_r]

anyone know what approximate study score this would get:
High A+ sacs
High B+ exam1
B+ exam 2

[squance]

My sis reckons she got 36/40 for methods. She stuffed up the first part to question 2. :S

[matthew_potato]

soz for reposting this, i posted b4 but no answer:

for the last question i said that the approx formula was an existing val (2) + the area (rectangle) under the differential curve that is (f'( x h). where h is the width, i then drew a differential graph (no tangents) with the area shown and stated that because the approx area is bigger, the approx value was bigger then original

it's not what the answers say, but do you think i'll get the mark? or is what i wrote even true?

[NE2000]

yeah I don't think what you say is actually true. It doesn't actually use the area, it uses tangents :S

[matthew_potato]

yeah I don't think what you say is actually true. It doesn't actually use the area, it uses tangents :S

hmm, true,, didn't really have any idea how to answer that so i just made up something that sounded "right" lol, oh well, 37/40's not bad yeah?

[nala]

37/40 is good! That's either really high A or low A+ depending on the grade distributions.

[matthew_potato]

37/40 is good! That's either really high A or low A+ depending on the grade distributions.

yeah,,, just as long as its not like the physics midyear

[makemytime]

37/40 is good! That's either really high A or low A+ depending on the grade distributions.

yeah,,, just as long as its not like the physics midyear

yeah.... 95% was minimum for A+... i had 90% and it was only an A

just wondering, for question 2a) if i did not place modulus signs, would i lose a mark?

[TrueTears]

Yeah I'd say for people who didn't place mod signs you'd lose a mark. Must have mod signs when anti-diffing to a log unless you know that the expression inside the log can never be smaller than 0.

[simpak]

The mod sign is even on the formula sheet.
If they give it to you that way, then that's the way they'd want it when you apply the formula.

[dcc]

I see a 'clearly' in one of the proofs - how amusing.  I'm sure VCAA won't mind though.  Perhaps it is clear?

[nels]

i got 5b(the four identical balls question)  incorrect, does that mean that i wont get full marks for 5c even though my working out was correct?

[nala]

I'm pretty sure you will get the method mark, but not the answer mark.