Tagged Questions

2
votes
1answer
18 views

What’s the difference between a Markov chain and a tree diagram?

What's the difference between a Markov chain and a tree diagram?
1
vote
1answer
11 views

When should you follow the ‘log modulus x’ conversion and when should you follow the ordinary raise by one power and divide by the same proceedure when integrating?

When should you follow the 'log modulus x' conversion and when should you follow the ordinary raise by one power and divide by the same proceedure when integrating? I often do the …
4
votes
2answers
44 views

How do I find out x in this equation?

The value of x(correct to three decimal places) which solves the equation 3^2x+3 = 13 is.
1
vote
1answer
16 views

Integration in probability

When we do all that integration stuff in the probability chapters (ie: probability distribution functions - 'what is 'a' if the function is a pdf?'), why don't we consider the +c's …
2
votes
1answer
18 views
1
vote
1answer
28 views

What are all the relationships between sin and cos?

What are all the relationships between sin and cos? I know that they are derivatives of one another (with modification) and also that when they are squared and added together they …
2
votes
1answer
13 views

What is standard normal distribution?

Is the standard normal distribution just a specific type of normal distribution or is it something different/slightly tweaked?
1
vote
1answer
149 views

What should my average test/SAC score be to get a 35 study score in methods?

a raw 35, before it gets scaled.
2
votes
1answer
44 views

How important is ‘formatting’ to examiners?

The 2008 Math methods VCAA exam presented the following question: Let y = (3x^2 – 5x)^5. Find dy/dx The examiner's solution was: Let f(x) = (3x2 – 5x)^5 = u^5 , u = 3x^ …
1
vote
1answer
8 views

Is there any use to memorising part of the equation of the normal distribution function?

Is there any use to memorising the part of the equation of the normal distribution function that is: e^(something complicated), or do we only need to really know the first part whi …
0
votes
0answers
9 views

How do I convert from a normal distribution to a standard normal distribution?

when we convert from a normal distribution into a standard normal distribution, when we substitute for Z, how do we account for the standard deviation in the denominator? Because …
2
votes
1answer
81 views

Finding the rate of change of the angle of elevation

An airplane is flying in a straight horizontal direction and at a constant height of 5000 metres. The angle of elevation of the airplane from a fixed point of observatio …
3
votes
1answer
43 views

Integrate 1/(x^2 +x+2)

Can't remember how to do these :( Integrate 1/(x^2 +x+2)
2
votes
1answer
83 views

How do I solve this quartic equation?

I know 3 points: (0,0) (34,3) and (68,0) I also know the gradient at the origin (0,0) is -0.123, and the gradient at (68,) is 0.123 If the general equation is y = ax4 + bx3 + cx …
1
vote
0answers
15 views

How do you find the exact solution of this trigonometric problem?

How do you find the exact solutions of: 2 sin(2 pi x) cos(2 pi x)+sqrt(3) (2 pi x) = 0

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