Worked Examples

Learn TMUA problem-solving techniques through carefully selected worked examples organised by Concept Bridge topic.

Availability follows each Topic, Worked Example, and Practice access level. Full solutions require membership unless marked public.

Reading and Iterating Functions from Graphs

1 Worked Examples

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Discovering Fixed Points and Cycles from a Composition Graph

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Geometric Series and Scaling

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Recovering a Missing Geometric Block

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Choosing a Useful Form of the Expansion

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Rewriting Before Expanding

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Following Function Relationships

Follow the information contained in an indirect function relationship without unnecessarily finding the whole function.

1 Worked Examples

Beyond the Discriminant

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How Turning Points Control the Number of Solutions

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Modulus and Symmetry in Graphs

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1

When Does the Reflected Graph Exist?

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Optimising Geometric Distances

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Reducing a Circle-to-Curve Distance

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Relating Coefficients and Term Positions

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Using Term Position and Coefficient Ratios

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Manipulating Sums and Indices

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Cancellation After Rewriting the Summand

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Divisibility in Binomial Expansions

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Counting Coefficients Divisible by 72

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Building New Graphs from a Known Graph

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Building a Graph Through Two Successive Operations

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Optimising with a Substitution

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Finding the Range After a Substitution

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Functional Equations

Use relationships between function values to create new equations and extract the information you need.

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Choosing Useful Substitutions in a Functional Equation

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Finding a Required Term or Coefficient

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Finding a Coefficient Without Full Expansion

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Using Substitution to Find Coefficient Sums

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Finding an Even-Power Coefficient Sum Without Expanding

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Index Shifts and Subsequence Structure

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Matching Terms at Different Positions

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Composing Graph Transformations

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Composing Transformations of an Already Transformed Function

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Partial Sums and Blocks

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Comparing Equal-Length Blocks

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Optimising with Restricted Inputs

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Combining a Hidden Restriction with Stationary Points

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Building an Expression to Optimise

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Building an Area Expression from Symmetry

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Beyond Polynomial Functions

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Finding the Critical Level of a Modulus Graph

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Following Repeated Relationships

Follow a relationship through several steps to reveal cycles, fixed behaviour and repeating structure.

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Closing a Cycle of Inputs and Function Values

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Working Backwards Through a Function

Decide when information about an output can be traced backwards to determine the input.

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Recovering an Input from Indirect Information

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When a Function Loses Information

Recognise when several inputs can produce the same output and determine what information remains when a relationship is reversed.

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When Equal Outputs Do Not Give Equal Inputs

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Recurrence Relations

Use relationships between successive terms to uncover patterns, cycles and structures without calculating every term.

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Using Consecutive Terms to Determine the Rule

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From Critical Points to Edge Cases

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Finding Boundaries Before Solving

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Functions Defined by Rules

Recognise the different ways unfamiliar functions and mathematical rules can be defined in TMUA problems.

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Reading a Defined Output as an Input Interval

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Understanding Indexed Functions

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Recognising Structure in a Defined Rule

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Counting Solutions in Repeating Patterns

Use periodicity and interval restrictions to count repeated solutions efficiently.

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Using One Period to Count Solutions

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When the Domain Changes the Answer

Understand how intervals and domain restrictions can change the number of valid solutions.

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Counting Solutions on a Restricted Domain

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Counting Solutions of Composite Functions

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Counting Solutions Using Two Functions

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