Exam 1 Answers

[asa.hoshi]

omg how much is question 11(b) worth? i put 0.4/0.68 = 4/68 = 1/17 -.-

2 marks. if you showed it was a conditional probability, then u'll get at least 1 mark.

[Matt89]

2b) was g(x) = loge(tanx) and evaluate g'(pi/4)

Ah yes, thank you! I got 2 aswell. phew.

As far as i know, the diff graph was supposed to look something like this:



(The red dot at the top is obviously not supposed to be there)

[asa.hoshi]

would you lose marks if you left it as squareroot(20) instead of 2squareroot(5)?

it should be alrite. unless the examiners are picky. but since it was a "fair" exam 1, i don't think they'll take any marks of because of that.

[hifer]

2b) was g(x) = loge(tanx) and evaluate g'(pi/4)

Ah yes, thank you! I got 2 aswell. phew.

As far as i know, the diff graph was supposed to look something like this:

(Image removed from quote.)

(The red dot at the top is obviously not supposed to be there)

Yup, and i think u shld put arrows on both ends

[Matt89]

Yup, and i think u shld put arrows on both ends

I didn't (i usually do, but forgot). I dont think i should lose marks because
- their graph didnt have arrows
- the domain was specified

[asa.hoshi]

i think u shld put arrows on both ends

really? since the graph they gave us didn't put arrows, i didn't. it was easy 3 marks i reckon.

stupid damn probability questions  :x

[squance]

Oh crap..for the probablity one about people going to supermarkets or something..I wrote my answer in decimal places.....

[hifer]

i think u shld put arrows on both ends

really? since the graph they gave us didn't put arrows, i didn't. it was easy 3 marks i reckon.

stupid damn probability questions  :x

I dun think they'll actually take marks off if u didn't put arrows, but i would suggest it to be on the safe side..

[Timtasticle]

What about closed circles on the ends of the derivative graph?

[kido_1]

I do not think they will take off marks for no arrows. This is because in past papers, assessment reports for graphs of derivatives did not have arrows.

[blue23]

i dont think it matters if you have no arrows.

any other thoughts on squareroot20 rather than 2squareroot5.

[Matt89]

What about closed circles on the ends of the derivative graph?

You mean, just at x=1 and x=3. There were no endpoints as the domain was R

[Daniel15]

Yup, and i think u shld put arrows on both ends

I didn't (i usually do, but forgot). I dont think i should lose marks because
- their graph didnt have arrows
- the domain was specified

Yeah, it should have arrows because the domain is R and hence it continues out in both directions.
But they didn't put arrows on theirs, so they shouldn't take off any marks due to people forgetting the arrows.

And yep, that's what my graph looked like

[Collin Li]

These threads have very high post velocities, so if there are any specific concerns, PM me a link to a specific post in this thread, and I'll check it out. It's too hard to follow the thread otherwise

[Defiler]

Oh crap..for the probablity one about people going to supermarkets or something..I wrote my answer in decimal places.....

Ditto. There goes another mark for me =(. 20/40 is looking shaky