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Use the Formula for the General Term of an Arithmetic $a _ { 11 }$

Question 104

Multiple Choice

Use the Formula for the General Term of an Arithmetic Sequence
-Find $a _ { 11 }$ when $a _ { 1 } = 21 , d = - 3$ .

A) $- 9$
B) $- 12$
C) $- 30$
D) 51

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