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22 September, 16:57

What is the 33rd term of this arithmetic sequence?

12, 7, 2, - 3, - 8, ...

A.) - 158

B.) - 157

C.) - 148

D.) - 147

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  1. 22 September, 18:31
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    A1=12

    d=a2-a1→d=2-7=-5

    a33=a1+32d→a33=12+32 (-5) →a33=12-160=-148
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