G prime of 1 1 2 is equal to four times 1 1 2 to the third power. 1 1 2 to the third power is 1 8th. So it's 4 8ths, or it's just 1 1 2, minus five times 1 1 2 to the fourth. So that's 5 1 6ths. Minus 5 1 6ths. And so this is equal to 8 1 6ths minus 5 1 6ths, which is equal to 3 1 6ths, but the important thing is it's equal to a positive value. So in this blue interval right over there, and actually let me put 4 5ths in a different color so we see that it's not part of that interval.