VCE Specialist 3/4 Question Thread!

[Niskii]

@ClimbTooHigh: Ah yes that works too! Originally I was attempting to do it that way but it looks like I made an error with the left hand side. Thank you

[BubbleWrapMan]

Yea, using FTC and substitution usually takes a lot of care

[Biceps]

Do we have to explicitly use u-substitution for anti differentiating f'(x)/f(x) functions?
i.e. would be sufficient working?

Or if the question is worth multiple marks. Often times the u substitution is involved in the marking criteria of integration questions.

[Mr. Study]

Hey guys,

Does anyone know if we are allowed to use Half-Angle formulas for trig?

I ... can't seem to recall how I know them ... -_-

[BubbleWrapMan]

Don't see why not

[rife168]

Hey guys which VCAA paper from the last few years do you think has been the most difficult? For both exam 1 and exam 2.

[Biceps]

2008 both

[BubbleWrapMan]

^agreed

[Hutchoo]

I don't really understand what's wrong with my brain.. but I did a lot better on the VCAA 2008 than I did on last years D= Last years was "the easiest spesh exam" as well.

[StumbleBum]

What is this 'k' constant from integration and where did they get it from...?

I had this after integration:

[BubbleWrapMan]

Normally "+c" is referred to as the constant of integration, but in this context it can be put inside the log since log(a) + log(b) = log(ab).

[StumbleBum]

Normally "+c" is referred to as the constant of integration, but in this context it can be put inside the log since log(a) + log(b) = log(ab).

So they just treated the constant as then simplified that way?

[BubbleWrapMan]

Yes

[StumbleBum]

Yes

Would my way yield the same result?

[BubbleWrapMan]

It would, yes. You'd just have c equal to ln(k).