Permutation & Combination: The Listing Method

The main focus of this permutation & combination question is part (iii) where students are expected to follow a simple definition and solve the question. I have used the listing method which could be slightly longer but it is clearer for understanding for most students. This is the thinking process but there is certainly a shorter presentation to the listing method by considering general cases since this is a 5 marks question. I would love to hear from you on the shorter presentation, leave your working in the comments section.

Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'A' Level H2 Maths. I develop Math strategies, sometimes ridiculous ideas to help students in understanding abstract concepts the fast and memorable way. I write this blog to share with you the stuff I teach in my class, the common mistakes my students made, the 'way' to think, analyze... If you have found this blog post useful, please share it with your friends. I will really appreciate it! :)

Integration Application: Area of Rectangles and Area under the Curve

This is a common type of question which involves using rectangles of equal width to estimate the area under the curve. There are two ways to draw the rectangles. One way will give you an underestimate of the exact area while the other way will give you an overestimate. In this question, both ways are explored and we zoom in on the approach of how to prove the total area of n number of rectangles is expressed in summation form.

Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'A' Level H2 Maths. I develop Math strategies, sometimes ridiculous ideas to help students in understanding abstract concepts the fast and memorable way. I write this blog to share with you the stuff I teach in my class, the common mistakes my students made, the 'way' to think, analyze... If you have found this blog post useful, please share it with your friends. I will really appreciate it! :)

Differential Equation Definitions & Problem

The main challenge in Differential Equation is formulating a differential equation from a problem situation and deriving its solution. It requires basic integration techniques as shown in the following question.

 

Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'A' Level H2 Maths. I develop Math strategies, sometimes ridiculous ideas to help students in understanding abstract concepts the fast and memorable way. I write this blog to share with you the stuff I teach in my class, the common mistakes my students made, the 'way' to think, analyze... If you have found this blog post useful, please share it with your friends. I will really appreciate it! :)