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Math - Coggle Diagram

- - - - When a constant is added to the previous number, in the series, to get the next number
    - - When a constant is multiplied by the previous number, in the series, to get the next number
    - - AP formula
        
        a + (n - 1)d
      - GP formula
        
        ar^n - 1
      - AP sum formula
        
        n/2 (2a + (n-1)d)
      - GP sum formula
        
        a(r^n - 1) / r-1
    - - I learnt about formula for the sum of AP and GP series
- - - - a^2 - b^2 = (a + b)(a - b)
      - (a + b)^2 = a^2 + b^2 + 2ab
      - (a - b)^2 = a^2 + b^2 - 2ab
      - (a - b)^2 = a^2 + b^2 - 2ab