300 IB Maths Exploration ideas, video tutorials and Exploration Guides
An introduction to logs:
More on log laws:
Proof of log rules:
Radioactive decay:
Solving equations using the natural log (lnx):
Simplifying indices:
u substitution to simplify equations:
Simplifying surds:
Rationalising the denominator for surds:
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IB Maths Resources from Intermathematics 
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