13, draw Y 1 =(x), Y2 = to be written as sinx at two equal points (0, line). Therefore, the total *** 18 field is zero.

P path 14 (>= 0), and the inverse function of q is symmetric about y = X. The other is y = X+c (1), as long as there is a zero (tangency) between (1) and y = χ 22. δ= 0, C = 7/4, PQ, that is, the minimum value of the graph of 2 * divided by 7 √24.

= 7√2/4