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16-08-2016
Mathematics

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Identify the 33rd term of the arithmetic sequence 9, 7 1/2, 6.

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meerkat18 meerkat18

19-08-2016

The formula of arithmetic sequence is expressed in the following manner:
an = a1 + d*(n-1) where d is the difference and n is an integer.
substituting,
7 = 9 + d*(2-1)
d= -1.5

hence,
a33 = 9 - 1.5*(33-1)
a33 = -39

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