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Can someone please help me with this?
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Can someone please help me with this?

Can someone please help me with this?-example-1
User Llewey
by
5.6k points

1 Answer

0 votes

Answer:


S_(13) = 403

Explanation:

the sum to n terms of an arithmetic series is


S_(n) =
(n)/(2) (a + l) ← a is the first term and l the last term

here a = - 5 and l = 67 , then


S_(13) =
(13)/(2) (- 5 + 67) = 6.5 × 62 = 403

User Atrag
by
4.6k points
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