Language of Sequences & Series What is a sequence? A?sequence?is an ordered set of numbers with a rule for finding all of the numbers in the sequence For example 1, 3, 5, 7, 9, … is a sequence ...
Introduction to Logarithms What are logarithms? Why use logarithms? Logarithms allow us to solve equations where the exponent is the unknown value We can solve some of these by inspection Exam Tip ...
Edexcel IGCSE Physics 復習筆記 5.2.2 Changes of State Changes of State When a substance changes state, the number of molecules in that substance doesn’t change and so neither does its mass T...
Laws of Indices What are the laws of indices? Laws of indices (or index laws) allow you to simplify and manipulate expressions involving exponents An exponent is a power that a number (called the b...
Edexcel IGCSE Physics 復習筆記 5.2.1 Solids, Liquids & Gases Solids, Liquids & Gases Matter can exist in one of three different states:?solid,?liquid, or?gas Solids In a solid...
Systems of Linear Equations What are systems of linear equations? A linear equation is an equation of the first order (degree 1) It is usually written in the form?ax + by + c = 0?where?a, b,?and?c?...
重大好消息！ 中國學生可以直接參加BMO了！ 在此之前，BMO是讓我們“望眼欲穿”的賽事。想要參加BMO，必須先參加SMC（Senior Maths Challenge）并取得優異成績，而SMC不接受個人報名，必須由英國教育體制的學校統一...
Edexcel IGCSE Physics 復習筆記 5.1.4 Pressure in Liquids Pressure in Liquids A fluid is either a?liquid?or a?gas When an object is immersed in a fluid, the fluid will exert pressure, squeezi...
Approximating Values How do I know what to round my answer to? Unless otherwise told, always round your answers to?3 significant figures?(3 s.f.) The first non-zero digit is the first?significant?d...
Edexcel IGCSE Physics 復習筆記 5.1.3 Pressure Pressure Pressure?is defined as The concentration?of a force or the force per unit area For example, when a drawing pin is pushed ...
Edexcel IGCSE Physics 復習筆記 5.1.2 Core Practical: Determining Density Core Practical 9: Determining Density Equipment List Resolution?of measuring equipment: 30 cm ruler = 1 mm Vernier ca...
Standard Form Standard form?(sometimes called?scientific notation?or?standard index form) gives us a way of writing very big and very small numbers using powers of 10. Why use standard form? Some n...
