VCE Methods Question Thread!

[KiNSKi01]

Yo can someone check if I have answered a question correctly. Teacher thought we may have some difficulty with it (btw our class is in Year 10 doing 1/2 Methods...just to clarify  )

"A tadpole begins to swim vertically upwards in a pond and after 't' seconds it is 25-0.1t^3 cm below the surface. How long does the tadpole take to reach the surface, and what is its speed then?"

I got 5.77 seconds. Do you have to solve for t when t=25-0.1t^3 as it has that much distance to cover before it reaches the surface?

[VanillaRice]

Yo can someone check if I have answered a question correctly. Teacher thought we may have some difficulty with it (btw our class is in Year 10 doing 1/2 Methods...just to clarify  )

"A tadpole begins to swim vertically upwards in a pond and after 't' seconds it is 25-0.1t^3 cm below the surface. How long does the tadpole take to reach the surface, and what is its speed then?"

I got 5.77 seconds. Do you have to solve for t when t=25-0.1t^3 as it has that much distance to cover before it reaches the surface?

So is 5.77 seconds when the distance function equal to zero?
Recall that the derivative of the distance is velocity. So to find the velocity, you would substitute t=5.77 into the velocity function (which is the derivative of the distance). Then, speed is the absolute value of velocity.

Hope this helps

[Skitty]

I've found the net signed area using triangles and squares.
Are you binding exercise books and notes? If you've only got a few loose sheets, can you just stick them into an exercise book? Otherwise, the cheapest binding is (I believe) a thermal(?) binding, which is a bit of heated plastic.
You would also need to say that X is a binomial random variable, as well as state n and p.
Please see those questions answered here in response to atar.notes.user's question (under 'Exam 2 questions')

Hope this helps

Thanks man I got my stuff binded at officeworks. How do you get the formatting for your solutions?

[Skitty]

Does anyone know whether we can fold our bound reference or cut corners? I want to bookmark some pages so it's easier to use in the exam.

[VanillaRice]

Thanks man I got my stuff binded at officeworks. How do you get the formatting for your solutions?

Oh my bad! Thought you were asking how I did the question

For using Latex on the forums, see this handy guide

Does anyone know whether we can fold our bound reference or cut corners? I want to bookmark some pages so it's easier to use in the exam.

That's fine! Just make sure nothing sticks out
Check out the VCE exams navigator for more info

[uhoh]

Last min question!! Exact or auto on CAS? I've gotten different ans from teachers

[Bri MT]

Last min question!! Exact or auto on CAS? I've gotten different ans from teachers

Exact

[princessofpersia]

does atarnotes have the solutions to the 2016 exam 2? (I looked at itute and VCAA but I would another source, the last question is confusing me too much)

[Skitty]

does atarnotes have the solutions to the 2016 exam 2? (I looked at itute and VCAA but I would another source, the last question is confusing me too much)

There's an alternative way to do the last questigon other than the logic method.

lim:k-->1(A(k))=2 (use the calculator)
im:k-->infinity(A(k))=0

As A(k) is decreasing when k>1, then 0<A(k)<2 when k>1.

I'm guessing VCAA will repeat a variant of this limits question and show g(x2)>g(x1) question today.

[princessofpersia]

There's an alternative way to do the last questigon other than the logic method.

lim:x-->1(A(k))=2 (use the calculator)
im:x-->infinity(A(k))=0

As A(k) is decreasing when k>1, then 0<A(k)<2 when k>1.

that's so beautiful, simple and quick and understandable. thank you.

[Skitty]

Anyone know how to do the last part to the last question? Couldn't seem to get the intersects of gk(x)=x to find the area.

[Joseph41]

Anyone know how to do the last part to the last question? Couldn't seem to get the intersects of gk(x)=x to find the area.

Exam discussion here - that's your best bet!

[Jessica1231]

A circle has centre at the origin and raidus 5. THe point (3,4) lies on the circle
find the equation of the tangent at P
IF the tangent crosses the x-axis at A and the yaxis at B. find the length of line segment AB

Let p(x1,y1) be a point on th ecircle with equation x^2+y^2=a^2
show that the equation of the tangent at P (x1,y1) is x1x+y1y=a^2
If x1=y1 and a=4, find the eqations of the possible tangents

[Skitty]

Hope this helps ^^

Sorry that it's sideways dunno how to flip it

[snowisawesome]

If there is a function,
y = 2^(x+1) - 2
and a second function y = 2^x
[

• ,[y]]=[
• ,[y]]+[[c],[d]]

How would you find the values of c and d that map of y = 2^x to y = 2^(x+1) - 2
Thanks