IB DP Maths: AA SL复习笔记2.2.5 Discriminants
Discriminants What is the discriminant of a quadratic function? How does the discriminant of a quadratic function affect its graph and roots? Forming equations and inequalities using the discrimina...
IB DP Maths: AA SL复习笔记2.2.4 Quadratic Inequalities
Quadratic Inequalities What affects the inequality sign when rearranging a quadratic inequality? The inequality sign is unchanged by... Adding/subtracting a term to both sides Multiplying/dividing ...
IB DP Maths: AA SL复习笔记2.2.3 Solving Quadratics
Solving Quadratics Equations How do I decide the best method to solve a quadratic equation? How do I solve a quadratic equation by the quadratic formula? How do I solve a quadratic equation by fact...
IB DP Maths: AA SL复习笔记2.2.2 Factorising & Completing the Square
Factorising Quadratics Why is factorising quadratics useful? Factorising gives roots (zeroes or solutions) of a quadratic It gives the x-intercepts when drawing the graph How do I factorise a monic...
IB DP Maths: AA SL复习笔记2.2.1 Quadratic Functions
Quadratic Functions & Graphs What are the key features of quadratic graphs? If a is positive then the vertex is the minimum point If a is negative then the vertex is the maximum point Wh...
IB DP Maths: AA SL复习笔记2.1.1 Equations of a Straight Line
How do I find the gradient of a straight line? Find two points that the line passes through with coordinates (x1, y1) and (x2, y2) The gradient between these two points is calculated by This is giv...
IB DP Maths: AA SL复习笔记1.5.1 Binomial Theorem
Binomial Theorem What is the Binomial Theorem? The binomial theorem (sometimes known as the binomial expansion) gives a method for expanding a two-term expression in a bracket raised to a power A b...
Edexcel IGCSE Chemistry 复习笔记 4.3.2 Halogens & Alkanes
Edexcel IGCSE Chemistry 复习笔记 4.3.2 Halogens & Alkanes Halogens & Alkanes In a substitution reaction, one atom is swapped with another atom Alkanes undergo a substitution reaction...
IB DP Maths: AA SL复习笔记1.4.1 Proof
Language of Proof What is proof? Proof is a series of logical steps which show a result is true for all specified numbers ‘Seeing’ that a result works for a few numbers is not enough to show that ...
