Get clear, concise, and accurate answers to your questions on IDNLearn.com. Ask your questions and receive comprehensive, trustworthy responses from our dedicated team of experts.

Can someone please help me with this?

Can Someone Please Help Me With This class=

Sagot :

Answer:

[tex]S_{13}[/tex] = 403

Step-by-step explanation:

the sum to n terms of an arithmetic series is

[tex]S_{n}[/tex] = [tex]\frac{n}{2}[/tex] (a + l) ← a is the first term and l the last term

here a = - 5 and l = 67 , then

[tex]S_{13}[/tex] = [tex]\frac{13}{2}[/tex] (- 5 + 67) = 6.5 × 62 = 403