Find S11 for 3 + 1 + (-1) + (-3) +…
A. -77
B. -75
C. -73
D. -71

Find S11 for 3 + 1 + (-1) + (-3) +…
A. -77
B. -75
C. -73
D. -71

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hmm doesn't look like a sequence to me for one

can you post a quick screenshot of the material? so we can see what you mean

Nope, it's a series

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