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Maths
A Level

Statistics: What is the difference between a Binomial and Poisson distribution?

Binomial:

  1. A single trial has only 2 possible outcomes: success or failure

  2. A fixed number of trials, n

  3. Trials are independent

  4. ...
Answered by Shivani S. Maths tutor
8396 Views

Integrate (cosx)^3

In order to integrate (cosx)^3, there is no given rule (by-parts, 'try' method, chain rule) which we can follow. We would need to split it into (cosx)^2 and cosx. Then use the identity: (sinx)^2 + (cosx)^...

Answered by Shivani S. Maths tutor
11611 Views

How many solutions are there of the equation a+b+c=12, where a,b,c are non-negative integers?

We can think of any solution of this equation as a string of twelve 1's and two 0's. For example, one such solution could be a=6, b=2 and c=4. In this case we would write the solution as 11111101101111. W...

Answered by Brendan M. Maths tutor
5574 Views

A tank is filled with water up to the height H0. At the bottom of the tank, there is a tap which is opened at t=0. How does the height of liquid change with time?(Hint: dH/dt is proportional to -H)

This is a typical C4 differential equation question. The same algorithm could be used for a lot of other problems.

First of all, from the hint we have that dH/dt = -kH (1).

We need to separa...

Answered by Maxim B. Maths tutor
6566 Views

Find the coordinate of the turning point of the curve y = x^2 - 10x + 7, by completing the square

First, we need to complete the square. We take the first part of the equation ignoring the constant ( + 7).  

y = x2 - 10x , we want to change the form of this equation from  x2

Answered by James P. Maths tutor
9209 Views

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