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Problems like 'locus of 2 |z-2| = |z-1|'

Intersecting chords theorem (use for Möbius transformations)

Geometric method for Möbius transformations: what you must write to explain it

Theorem needed for Möbius transformations when z-locus is a line

Intersecting secants theorem (as used for geometric method for Möbius transformations)

Geometric method for Möbius transformations when z-locus is a line

Calculating Möbius transformations when pole is on the z-circle

Geometric method for calculating Möbius transformations

Using Pol( , ) to calculate |z| and arg(z)

Cross products, dot products, and quaternions

Finding extra roots of cubics and quartics

Matrices and geometrical transformations

Using Pol( , ) to calculate |z| and arg(z) for complex numbers

How to do linear interpolation for AS-level maths

How to write proofs by induction about matrix multiplication

Another way to write proofs by induction about divisibility

How to write proofs by induction about divisibility

How to write proofs by induction with series

Proof by induction with sequences