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What is the 33rd term of this arithmetic sequence?

12, 7, 2, -3, -8, …

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The answer is -148(i.e minus 148)..Formula to use is ..T33=a+(n-1)d.....Where *T33* is the 33rd term, *a* is the 1st term=12 *n* is the total number of terms in the progression=33... And*d* is the common difference existing between the terms=-5.
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