Methods (CAS) 2009 exam 2 Suggested Solutions.

[jasrulz63]

I need to fix up the pdf to add in TT's amendments, then I'll upload it (assuming it's ok with him)

[Over9000]

thus B is false

There is no stationary point at x=0, its undefined, did u differentiate the function?

[simpak]

I totally can't remember if I accidentally put D for the one about 'how many solutions'.
I either put E or D.
If I put D, I'll die D:

[TrueTears]

there is a stationary pt at (0,2) try it on your calculator

B is true.

[TrueTears]

I need to fix up the pdf to add in TT's amendments, then I'll upload it (assuming it's ok with him)

Yeah go for it.

[Crazometer]

Errr, not beating a dead horse or anything but isn't the domain for f(g(x)) the intersection of the domain of f(x) and range of g(x) ?

[TrueTears]

Errr, not beating a dead horse or anything but isn't the domain for f(g(x)) the intersection of the domain of f(x) and range of g(x) ?

No it's the domain of g(x).

[Over9000]

Errr, not beating a dead horse or anything but isn't the domain for f(g(x)) the intersection of the domain of f(x) and range of g(x) ?

Thats for f(x) + or X g(x).

[hyperblade01]

With regards with 1e)i finding the rule

For f(g(x)) to exist , ran g needs to be a subset or equal to dom f right?

But dom f [0, infinity) whilst ran g is R?




EDIT: But I assumed it was possible otherwise that whole page woulda been blank

[hard]

OMGGGGGG WTFFFFFFFFF SOME OF THE Q'S  ON THE EXAM YOU POSTED TT WAS DIFFERENT TO THE QS ON MY EXAM LIKE Q1 MC AND THERE WAS NO GRAPH FOR Q1 OF SHORT ANSWER

WTFFFFFFFFFFFFFFFF

[hyperblade01]

OMGGGGGG WTFFFFFFFFF SOME OF THE Q'S  ON THE EXAM YOU POSTED TT WAS DIFFERENT TO THE QS ON MY EXAM LIKE Q1 MC AND THERE WAS NO GRAPH FOR Q1 OF SHORT ANSWER

WTFFFFFFFFFFFFFFFF

It's CAS, you mighta done non-CAS

[almostatrap]

thanks TT!

lost 6 marks. would have only lost one but in my spare time i went back to EA 1 and fucked it all up lol

[TrueTears]

With regards with 1e)i finding the rule

For f(g(x)) to exist , ran g needs to be a subset or equal to dom f right?

But dom f [0, infinity) whilst ran g is R?




EDIT: But I assumed it was possible otherwise that whole page woulda been blank

Range g is .

[anti]

I checked the amended version, but I still think cii. is wrong unless I'm overlooking something which is very possible XD

You're told that you have a tin of balls, so can't you presume that X<68.5 and use 1 minus the result of ci as the probablity?

Thanks for the solutions by the way.

[ash.w]

Nah the domain is R.

the domain is R+ U {0}