i am not sure how to solve this . Thanks for helping .
Hello, thereddevils!
Note that is a positive integer.
i am not sure how to solve this . Thanks for helping .
. . Hence, is also positive.
Multiply by 4: .
Take the square root: .
And we have: .
We have: . . . . an up-opening parabola.
. . It is positive on the "outside" of its -intercepts.
So we solve: .
. . Quadratic Formula: .
Hence, is positive for: .
. . Therefore: .
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Check
. . We're golden!