Learn the methods
Learn to explain sequences, patterns and sums, then practise in short sessions. Counting recurrences use topic 12; nested power sums use topic 2. Some patterns are conventions, not uniquely forced continuations.
Draw a model before calculating.
Choose a method and explain when it applies.
Check units, conditions and the requested quantity.
Counting recurrences use topic 12; nested power sums use topic 2. Some patterns are conventions, not uniquely forced continuations.