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9. Find the sum of the first multiples of 5.​
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3 votes
9. Find the sum of the first multiples of 5.​

User Jamesc
by
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1 Answer

5 votes

Answer:

75

Explanation:

Use the arithmetic progression formula: S =n/2(2a + (n-1)d)

a = 5, d = 5, n = 5

S = 5/2((2(5) + (5-1)(5)) = 75

User Eric Nordvik
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