482424
Description
Mind Map by SarahBarrett, updated more than 1 year ago
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Created by SarahBarrett
over 10 years ago
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Summing Sequences
- Sum of the natural numbers
- Sum of the squares of the natural numbers
- The method of differences
- Sum of: f(r) - f(r+1) = f(1) - f(n+1)
- Check which terms cancel
out by writing out the first and last few.
- Sum of: f(r) - f(r+1) = f(1) - f(n+1)
- Sum of the cubes of the natural numbers
- 0.25 x n^2 x (n+1)^2
- 0.25 x n^2 x (n+1)^2
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