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X = {a,b,c,d,e} T = {X, 0 , {a}, {a,b}, {a,e}, {a,b,e}, {a,c,d}, {a,b,c,d}} Show that...

X = {a,b,c,d,e}
T = {X, 0 , {a}, {a,b}, {a,e}, {a,b,e}, {a,c,d}, {a,b,c,d}}

Show that the sequence a,c,a,c, ,,,,,,, converges to d.

please...
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