FP2.3.3 - Loci and regions in the Argand diagram

Interpret and sketch complex-number loci and regions defined by modulus and argument conditions, including |z − a| = b, |z − a| = k|z − b| and arg(z − a) = β.

Use fp2.3.3 - loci and regions in the argand diagram to connect the rule to the data and decision in the question.

This matters because fp2.3.3 - loci and regions in the argand diagram determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply fp2.3.3 - loci and regions in the argand diagram to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: FP2.3.3 - Loci and regions in the Argand diagram is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.