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Brooklynn Kaufman
Mathematics
25 March, 12:18
Find S5 when Sn = 40 - 8n
+5
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Marianna Dawson
25 March, 12:28
0
S (n) = - 8n + 40
Substitute 5.
S (5) = - 8 (5) + 40
= - 40 + 40
S (5) = 0
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