SOLUTION: find the minimum number of AP 1,8,15............. such that the sum is greater than 1000
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Question 946119
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find the minimum number of AP 1,8,15............. such that the sum is greater than 1000
Answer by
Fombitz(32388)
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Let's find the solution when it does equal zero by completing the square.
We're only interested in positive values,
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Since we only use integral values, choose the next one up.