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Sigma: -notation

Sigma: -notation.  is the Greek letter S, called ‘sigma’, and it indicates that we want the sum of all terms. e.g. 1 + 2 + 3 + 4 + …. + 20. The sum of the first 20 counting numbers. This can be written in the sigma notation as:. Last value of n. formula for n th term.

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Sigma: -notation

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  1. Sigma: -notation  is the Greek letter S, called ‘sigma’, and it indicates that we want the sum of all terms e.g. 1 + 2 + 3 + 4 + …. + 20 The sum of the first 20 counting numbers. This can be written in the sigma notation as: Last value of n formula for nth term First value of n

  2. Finding a series from - notation Write out the following series in full. (i) (ii) (i) 5 + 8 + 11 + 14 (ii) 5 + 7+ 11 + 19 Write down the first three terms and the last term of the following series. (i) (ii) (i) 0 + 2 + 6 +…. + 110 (ii) 6 + 18+ 54 + …. + 1458

  3. Expressing a given series in  -notation Write the following series in - notation (i) 3 + 8 + 13 + 18 (ii) 4 + 7+ 10 + 13 + … + 28 (i) (ii) Write down the first three terms and the last term of the following series. (i) 2 + 4 + 8 + 16 + + 32 (ii) 2 + 8 + 26 + 80 + 242 (i) (ii)

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