Edexcel IGCSE Physics: Double Science 复习笔记：3.2.1 Light & Sound Waves Light Visible light is a part of the electromagnetic spectrum which means it is a transverse wave This means the...
Exponential Equations What are exponential equations? An equation where the unknown is a power In simple cases the solutions can be “spotted” How do I solve exponential equations? Laws of In...
Laws of Logarithms What are the laws of logarithms? There are many laws or rules of indices, for example There are equivalent laws of logarithms (for a > 0) There are also some particular result...
Derivatives of Exponential Functions What is the derivative of e? y = ex has the particular property ie for every real number x, the gradient of y = ex is also equal to ex (see Derivatives of Expon...
"e" Exponential Function What is e, the exponential function? The exponential function is y = ex e is an irrational number e ≈ 2.718 As with other exponential graphs y = ex passes through (0, 1) ha...
Logarithmic Functions Logarithmic functions a = bx and log b a = x are equivalent statements a > 0 b is called the base Every time you write a logarithm statement say to yourself what it means l...
Exponential Functions Exponential functions Exponential functions of the form y = ax with a > 0 are considered at A level Exponential graphs All graphs of the form y = ax will pass through (0, 1...
Modelling with Trigonometric Functions Modelling with trigonometric functions Various real-life situations can be modelled using trigonometric functions You need to be able to interpret the equatio...
北京时间2022年10月19日，大学理事会(College Board)正式开放SAT机考的国际报名，全新SAT机考的备考资源也已上线。从2023年开始，美国以外的所有SAT考试都将转为机考，美国SAT考试将在2024年全面转为机考。 无论...
