Solved

Find the Sum of the First N Terms of the Following

Question 299

Multiple Choice

Find the sum of the first n terms of the following arithmetic sequence.
- $a _ { 2 } = 21 , a _ { 5 } = - 42 ; \quad \mathrm { n } = 10$

A) 735
B) 1365
C) -735
D) -525

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