Methods 2009 Exam 1 Suggested Solutions

[TrueTears]

Alright here it is. Very easy exam lol

For those who don't have winrar, PDF version can be downloaded here: http://www.mediafire.com/file/xmdjyrwniwd/TT's Suggested Solutions for Methods!.pdf (Thanks goes to jasrulz63)

[hyperblade01]

Dedicated as always

[TrueTears]

There we go, finally for once my scanner ain't being a bitch

[chinx_4eva]

thank you TrueTears.

[THem]

Fucken crazy on 10b there

haha

[TrueTears]

Fucken crazy on 10b there

haha

Man in the exam I wrote wayyy more lol

[almostatrap]

Thanks for the solutions!


for q10. I wrote out x=8, h=0.06, f(x)=blah and f'(x)=blah all correctly

then i accidentally subbed in 2 instead of 8 for f'(x), giving a wrong answer. would this be 2 or 3, out of 4marks?

[THem]

Quick question:

For 7B ( find the variance from
the distribution table given),

x   0     1      2     3     4
    0.1  0.2   0.4  0.2   0.1

I wrote E(x^2)-[e(x)]^2
= (0+0.2+1.6+1.8+1.6)-(0.2+0.8+0.6+0.4)
= 5.2 - 2
= 3.2

I didn't square the mean, giving me
3.2 instead of 1.2

It was a 3 mark question and i'm
assuming 2 marks for method, 1
for answer.
Do you think I'll lose 2 or 1?

[m@tty]

Awesome work TT. Good answers too  

[TrueTears]

Quick question:

For 7B ( find the variance from
the distribution table given),

I wrote E(x^2)-[e(x)]^2
= (0+0.2+1.6+1.8+1.6)-(0.2+0.8+0.6+0.4)
= 5.2 - 2
= 3.2

I didn't square the mean, giving me
3.2 instead of 1.2

It was a 3 mark question and i'm
assuming 2 marks for method, 1
for answer.
Do you think I'll lose 2 or 1?

Lose 1 for answer mark I reckon.

[angelboykevin]

dont u lose mark for 1b) if u leave the answer like that? thanks for the solution^^

[m@tty]

1.b) I simplified to

Damn I made an error there  

should be

Error from overworking a question...

[TrueTears]

dont u lose mark for 1b) if u leave the answer like that? thanks for the solution^^

Why would you lose a mark...

It never said in expanded form and it's the same thing essentially.

[invalid]

Thank you! Very easy exam, but made so many silly little mistakes >.<
Didn't find f'(pi), just f'(x), even managed to mess up the ridiculously easy probability question. Hoping examiners will at least see that I had the formulas right.

[Ilovemathsmeth]

I quite like this year's exam. =) I note they've given you two probability questions. The differentiation questions look interesting.

*Fond memories*