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Asked by Tobi

Work out the first 3 terms of 2n-6?

The rule 2n-6 relates the 'nth' term to its value. For example subbing in n=1 into the equation gives us the first term in the series. Subbing n=2 in gives the second term etc etc. Therefore the first term is given by 2*(1) -6 = -4. The series then follows -4, -2, 0, 2…. NOTE: the multiple of n in the given rule ie 2 in this case will be the difference between each term in the series.

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Samuel Power
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Hi Tobi, Let's make n = 1 ( 2 x 1 ) - 6 = -4 When n = 2 (2 x 2) - 6 = -2 When n = 3 (3 x 2) - 6 = 0 So the first 3 terms are -4 , -2, 0 Hope this is all clear, Any questions, please get in touch.

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Emma Berwick
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