Parabola: the value looks like the bottom of a valley.

As far as I remember, the answer is: The minimum value looks like the bottom of a valley. 

Istg idk..if there all the same length there all the same number but use google

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)