Edexcel IGCSE Physics: Double Science 复习笔记：4.1.3 Efficiency
Edexcel IGCSE Physics: Double Science 复习笔记：4.1.3 Efficiency Efficiency The efficiency of a system is a measure of how well energy is transferred in a system Efficiency is defined as: &n...
Edexcel A Level Maths: Pure:复习笔记7.2.2 Increasing & Decreasing Functions
Increasing & Decreasing Functions What are increasing and decreasing functions? A function?f(x)?is?increasing?on an interval?[a,?b]?if?f'(x)?≥?0?for all values of?x?such that?a<?x?<?b. If...
Edexcel A Level Maths: Pure:复习笔记7.2.1 Gradients, Tangents & Normals
Gradients, Tangents & Normals Using the derivative to find the gradient of a curve To find the gradient of a curve?y=?f(x)?at any point on the curve, substitute the?x?coordinate?of the point in...
Edexcel A Level Maths: Pure:复习笔记7.1.3 Differentiating Powers of x
Differentiating Powers of x How do I differentiate expressions involving powers of?x? Powers of?x?are differentiated according to the following formulae: Differentiating terms with positive integer...
Edexcel IGCSE Physics: Double Science 复习笔记：4.1.2 Conservation of Energy
Edexcel IGCSE Physics: Double Science 复习笔记：4.1.2 Conservation of Energy Conservation of Energy The principle of conservation of energy states that: Energy cannot be created or de...
Edexcel IGCSE Physics: Double Science 复习笔记：4.1.1 Energy Stores & Transfers
Edexcel IGCSE Physics: Double Science 复习笔记：4.1.1 Energy Stores & Transfers Energy Stores & Transfers Energy can be stored in different ways, and there are changes in the way it ...
Edexcel A Level Maths: Pure:复习笔记7.1.2 First Principles Differentiation
First Principles Differentiation What is the derivative or gradient function? For a curve?y?=?f(x)?there is an associated function called the?derivative?or?gradient function The derivative of f(x) ...
Edexcel A Level Maths: Pure:复习笔记7.1.1 Definition of Gradient
Definition of Gradient What is the gradient of a curve? At a given point the?gradient?of a curve is defined as the gradient of the?tangent?to the curve at that point A?tangent?to a curve is a line ...
Edexcel A Level Maths: Pure:复习笔记6.3.3 Using Log Graphs in Modelling
Using Log Graphs in Modelling What are log graphs? Log graphs are used when the scale of a graph increases or decreases exponentially It can very difficult to read specific values from graphs with ...
