Stage: 5 Challenge Level: 
Why do this
problem?
Easy to spot solutions but can you be sure they are the only possible solutions?
Possible approach
Use graphs .
Easy to spot solutions but can you be sure they are the only possible solutions?
Possible approach
Use graphs .
Dynamical systems. Mathematical reasoning & proof. Number theory. Manipulating algebraic expressions/formulae. Stage 5 - Reviewed 2012. Powers & roots. Graphs. Inequality/inequalities. Patterned numbers. Index notation/Indices.
Published November 2000.
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