AQA A Level Maths: Pure复习笔记2.1.1 Laws of Indices
Laws of Indices What do I need to know about laws of indices? Laws of indices (or index laws – 'index' is the singular, 'indices' is the plural) allow you to simplify and manipulate expressi...
AQA A Level Maths: Pure复习笔记1.2.1 Proof by Contradiction
Proof by Contradiction What is proof by contradiction? A proof by contradiction assumes the opposite result is true Then, through a series of logical steps, shows that this cannot be so How ...
IB DP Maths: AA SL复习笔记5.2.4 Further Applications of Differentiation
Stationary Points & Turning Points What is the difference between a stationary point and a turning point? A stationary point is a point at which the gradient function is equal to zero The tange...
IB DP Maths: AA SL复习笔记5.2.3 Second Order Derivatives
Second Order Derivatives What is the second order derivative of a function? If you differentiate the derivative of a function (i.e. differentiate the function a second time) you get the second orde...
IB DP Maths: AA SL复习笔记5.2.2 Techniques of Differentiation
Chain Rule What is the chain rule? How do I know when to use the chain rule? How do I use the chain rule? Are there any standard results for using chain rule? Exam Tip You should aim to be able to ...
Edexcel IGCSE Physics 复习笔记 2.1.3 Resistance
Edexcel IGCSE Physics 复习笔记 2.1.3 Resistance Calculating Current, Resistance & Potential Difference Resistance is defined as the opposition to current: The higher the resistance of a ...
Edexcel IGCSE Physics 复习笔记 2.1.2 Voltage & Energy
Edexcel IGCSE Physics 复习笔记 2.1.2 Voltage & Energy Voltage The terminals of a cell make one end of the circuit positive and the other negative This sets up a potential difference acro...
Edexcel IGCSE Physics 复习笔记 2.1.1 Charge & Current
Edexcel IGCSE Physics 复习笔记 2.1.1 Charge & Current Current Electric current is defined as the rate of flow charge In other words, the size of an electric current is the amount of char...
AQA A Level Maths: Pure复习笔记1.1.4 Disproof by Counter Example
Disproof by Counter Example What is disproof by counter-example? Disproof by counter-examples involves finding a value that does not work for the given statement That value is called a count...
