Edexcel IGCSE Biology 复习笔记 4.1.1 Key Terms in Ecology
Edexcel IGCSE Biology 复习笔记 4.1.1 Key Terms in Ecology Key Terms in Ecology There are several key terms that we use when referring to the various different components of an ecosystem and ...
Edexcel IGCSE Biology 复习笔记 3.2.8 Natural Selection
Edexcel IGCSE Biology 复习笔记 3.2.8 Natural Selection Darwin's Theory of Evolution by Natural Selection Charles Darwin proposed the theory of evolution by natural selection He came up with this th...
IB DP Maths: AA HL复习笔记2.4.1 Exponential & Logarithmic Functions
What is an exponential function? What are the key features of exponential graphs? The graphs have a y-intercept at (0, 1) The graphs do not have any roots For a > 1 this is the limiting value wh...
IB DP Maths: AA HL复习笔记2.3.4 Graphing Functions
How do I graph the function y = f(x)? The horizontal axis is used for the domain The vertical axis is used for the range You will be able to graph some functions by hand For some functions you will...
IB DP Maths: AA HL复习笔记2.3.3 Symmetry of Functions
What are odd functions? What are even functions? What are the symmetries of graphs of odd & even functions? The graph of an odd function has rotational symmetry The graph is unchanged by a 180°...
IB DP Maths: AA HL复习笔记2.3.2 Composite & Inverse Functions
What is a composite function? How do I find the domain and range of a composite function? Exam Tip Worked Example Inverse Functions What is an inverse function? What are the connections between a f...
IB DP Maths: AA HL复习笔记2.3.1 Language of Functions
What is a mapping? A mapping transforms one set of values (inputs) into another set of values (outputs) Mappings can be: One-to-one Each input gets mapped to exactly one unique output No two inputs...
IB DP Maths: AA HL复习笔记2.2.5 Discriminants
What is the discriminant of a quadratic function? The discriminant of a quadratic is denoted by the Greek letter Δ (upper case delta) For the quadratic function the discriminant is given by This is...
Edexcel IGCSE Biology 复习笔记 3.2.7 Mutation
Edexcel IGCSE Biology 复习笔记 3.2.7 Mutation Mutations Mutations are rare, random changes that occur in the sequence of DNA bases in a gene or a chromosome Mutations occur continuously As t...
