Exam Question : Usage of Binomial Formula


Harry - a vivd reader of askalwayslovely.blogspot.com sent me an email asking about solving of the following question. He did it using trial and error. I believe it will take him some time. He felt that his approach was not the best so he emailed me asking for alternatives.

In fact for this question, there is a step by step way which will get us the answer in less than 8 minutes time.

Question: If the coefficient of [pmath]x^k[/pmath] and [pmath]x^(k+1)[/pmath] in the expansion of [pmath](2x+3)^19[/pmath] are equal, find [pmath]k[/pmath]

Click on the image for bigger view

slide1.PNG
slide2.PNG

Related Post

A Goodie For You! Monthly Math Exam Papers Questions (With Answer Key Included) Update (2011): Download of Maths Exam Papers is not available as of now. Photo Credit:psd In response to the poll conducted in Dec '08, we hav...
F-r-e-e GCE O Level Mathematics Exam Questions Papers For Download?Just Buy A Copy In BookStores I thought  I should say a little more with relation to the earlier article I wrote on How To Create Math PowerNotes For Revision of Tests & Exams ...
Download your set of Logarithms Questions Free! In conjunction with celebrating the 100th post on singaporeolevelmaths.com, I have prepared a set of logarithms questions for all of you. Those who...
A-Math Trigo Graphs Terms you must understand in Additional Maths (A-Maths) Trigo Graphs 1. Amplitude 2. Period You must be able to sketch given any trigo eqn and ...
A-Math: Differentiation & Integration Application : Examples of Typical Kinematics Questions I was looking through 2008 GCE O Level Additional Mathematics Exam Papers (Subject Code: 4038) and as expected, there was a Kinematics question (worth...

Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'O' Level A-Maths and E-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! :)

One Response to Exam Question : Usage of Binomial Formula

Leave a reply