Levites367 Levites367

20-07-2015
Mathematics

Answered

What is the 33rd term of this arithmetic sequence? 12, 7, 2, -3, -8, …

A-158
B-157
C-148
D-147

Verified Answer :

20-07-2015

\(12,7,2,-3,-8,... \\ \\ a_1=12 \\ d=a_2-a_1=7-12=-5 \\ \\ a_n=a_1+d(n-1) \\ a_{33}=12-5(33-1) \\ a_{33}=12-5 \times 32 \\ a_{33}=12-160 \\ a_{33}=-148\)

The answer is C.

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