== Let xn = (-1)/(2n 1). - Part (d): Suppose n is even. Find Tn and also find un and vn. Part (e): Suppose n is odd. Find Tn and also find un and vn. Part (f): Give lim inf xn = lim un and lim sup x = lim un. Part (g): Does lim xn exist? - Let xn = (-1)/(2n 1). Part (a): List the first six terms of this sequence. Part (b): Give the set T3, where Tn = {xkk>n}. Part (c): Find u3 and v3, where un inf Tn and Un = sup Tn.