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How to work out the nth term of a decreasing number sequence (one which goes down).m2ts

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How to work out the nth term of a decreasing number sequence (one which goes down).m2ts

109,381 views November 11, 2013 3:16

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Channelmaths3000

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Here you will be shown how to find the nth term of a sequence which decreases by the same amount each time. The first example looks at finding the nth term of the sequence 7,5,3,1,-1. Since the sequence is going down by 2 each time you will need to compare the sequence to the multiples of -2. This will give the nth term as -2n+9. Another example includes finding the nth term of the sequence -2,-5,-8,-11,-14... With this sequence you will need to compare it to the multiples of -3 as the sequence is decreasing by 3 from term to term. Therefore, the nth term of this sequence will be -3n + 1. Make sure you know how to find the nth term of an increasing sequence before you attempt these ones.

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maths3000 published this 3:16 video tutorial on November 11, 2013. It has been watched 109,381 times on YouTube.

Channel
maths3000
Category
Education
Duration
3:16
Published
November 11, 2013
Views
109,381
Likes
690

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