Grace G.
asked • 10/25/19geometric series
∑8n=1 -2(n-1)
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1 Expert Answer
Mark M. answered • 10/25/19
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Mathematics Teacher - NCLB Highly Qualified
Sn = a1(1 - rn) / (1 - r)
S8 = 1(1 - (-2)8) / (1 + 2)
S8 = 1(1 - 256) / 3
S8 = -255 /3
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Mark M.
You shall be able to do the problems you post if you located the relevant formula and apply it.10/25/19