find the smallest positive integer n satisfying the inequality: 1+2+3+....+n>2007
whats an inequality?
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Hello, mich13!
The symbol means "greater than".Find the smallest positive integer n satisfying the inequality: .
whats an inequality? . . . . You don't know?
You may be expected to know this formula . . .
The sum of the positive integers from to is: .
So we have: .
We have a quadratic inequality: .
The equation: .
. . has roots: .
Therefore: .