Edexcel IGCSE Physics: Double Science 復習筆記：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...
北京時間2022年10月19日，大學理事會(College Board)正式開放SAT機考的國際報名，全新SAT機考的備考資源也已上線。從2023年開始，美國以外的所有SAT考試都將轉為機考，美國SAT考試將在2024年全面轉為機考。 無論...
