# A-Math: Differentiation Shortcut Lies In Pausing & Simplifying

Differentiation is a big thing in fact major chapter for all Secondary 4 'O' level students.

Read all about the basics Differentiation techniques here. (Examples included) I would like to share one question from my A-Math Ultimate Leap Programme (weekly coaching class) which has 2 different approaches to solve it.

## Example:

Very often, I notice students will jump into Quotient rule whenever a fraction is given. Just like this student here:

May I suggest that you pause for 3 seconds to think about the approach. Ask yourself 'Is there anything I can simplify?'

Here's another student who pauses:

Notice this student spends his time simplifying before applying chain rule in differentiation.

I hope you enjoy this example. Both students are correct in their answers, which one do you prefer more? A or B?

### Ai Ling Ong

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! :)

2 Responses to A-Math: Differentiation Shortcut Lies In Pausing & Simplifying
1. :)
February 6, 2010 | 12:47 am

I wasn't even aware of the shortcut.
My teacher just taught v differentiate(u) - (u) differentiate(v)divided by v^2
It was a a long process as i still have to take time to factor out. I realised Student B's method is much shorter, and will ensure better accuracy of the answers. The example really helped a lot ! :)

2. Nguy?n ??c Tùng
February 7, 2010 | 8:17 pm

There is another way to solve this problem.
I have been leart it in my school.
But when I solved this problem in that way. It was very long and hard.

The example of student A, I think is the best.

I like it.