# 2013 GCE ‘A’ Level exam results release next Monday

## Release of 2013 GCE ‘A’ Level Examination Results on 3 March 2014

1The results of the 2013 Singapore-Cambridge GCE Advanced Level Examination will be released on Monday, 3 March 2014.

## Differentiation Rules

Today, we will recap the four basic rules of Differentiation:

• Differentiating Powers of x

$\displaystyle\frac{d}{dx}x^n=nx^{n-1}$

(Power comes down, and the remaining power reduced by 1)

• Chain Rule (i.e. times differentiate inside the bracket)
• Product Rule

$\displaystyle\frac{d}{dx}(uv)=u\frac{dv}{dx}+v\frac{du}{dx}$

(Keep the first term X differentiate the second, PLUS keep the second term X differentiate the first)

• Quotient Rule

$\displaystyle\frac{d}{dx}(\frac{u}{v})=\frac{v\frac{du}{dx}-u\frac{dv}{dx}}{v^2}$

(Keep the bottom term differentiate the top MINUS keep the top differentiate the bottom, whole thing over $v^2$)