AQA A Level Maths: Pure复习笔记2.5.1 Expanding Brackets
Expanding Brackets What do I need to know about expanding brackets? To expand brackets, the rule is that each term in one set of brackets must be multiplied by each term in the other set of ...
AQA A Level Maths: Pure复习笔记2.4.3 Inequalities on Graphs
Inequalities on Graphs Inequalities on graphs Inequalities can be represented on graphs by shaded regions and dotted or solid lines These inequalities have two variables, x and y Several ine...
AQA A Level Maths: Pure复习笔记2.4.2 Quadratic Inequalities
Quadratic Inequalities Quadratic inequalities Similar to quadratic equations quadratic inequalities just mean there is a range of values that satisfy the solution Sketching a quadratic graph...
AQA A Level Maths: Pure复习笔记2.4.1 Linear Inequalities
Linear Inequalities What are linear inequalities? Linear inequalities are similar to equations but answers take a range of values Linear means there will be no terms other than degree 1 no s...
AQA A Level Maths: Pure复习笔记2.3.3 Quadratic Simultaneous Equations
Quadratic Simultaneous Equations What are quadratic simultaneous equations? When you have more than one equation in more than one unknown, then you are dealing with simultaneous equations An...
AQA A Level Maths: Pure复习笔记2.3.2 Linear Simultaneous Equations - Substitution
Linear Simultaneous Equations - Substitution What are simultaneous linear equations? When you have more than one equation in more than one unknown, then you are dealing with simultaneous equ...
IB DP Maths: AI HL复习笔记4.6.1 Linear Combinations of Random Variables
Transformation of a Single Variable What is Var(X)? Var(X) represents the variance of the random variable X Var(X) can be calculated by the formula You will not be required to use this formula in t...
IB DP Maths: AI HL复习笔记4.5.2 Expected Values
Expected Values E(X) What does E(X) mean and how do I calculate E(X)? E(X) means the expected value or the mean of a random variable X The expected value does not need to be an obtainable value of ...
IB DP Maths: AI HL复习笔记4.5.1 Discrete Probability Distributions
Discrete Probability Distributions What is a discrete random variable? A random variable is a variable whose value depends on the outcome of a random event The value of the random variable is not ...
