=+25.10. 1 Suppose that X ,, assumes as values y ,, + k8 ,,, k = 0, + 1 ,..., where 8 ,, > 0.

Suppose that 8 ,, - > 0 and that, if k ,, is an integer varying with n in such a way that y ,, + k ,, 8 ,, - > x, then P[X .. = y ,, + k ., 8 ,1871 -> f(x), where f is the density of a random variable X. Show that X ,, - X.