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


Related Post

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...
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...
A-Math Circular Measure 5 marks, showing qn. Another question from GCE O Level Additional Mathematics (A-Math). :)
Binomial Expansion Teaches how to choose the RIGHT partner (: I always like to share with my students what each Math topic has to do with their everyday life, particularly their future. Yesterday, I did Binomi...
A-Math Binomial Expansion: Finding Term Independent of x By A Shortcut Method In the earlier post on free Math Exam Papers, we received very good response. Almost 200 copies were downloaded in less than 7 days. We have a subscri...

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