Series T is a sequence of numbers where each term after the first term is x greater than the term that precedes it. If the sum of the first and last terms of series T is 14, then what is the sum of the first three terms of series T and the last three terms of series T?	Options.
A) -7	B) 7	C) 14	D) 42	E) 84
Since no information is given about the first term, x, and anything else,   assume first term = 1; hence last term = 13,   so, 1 3 5 7 9 11 13 will suffice the series in which x = 2, from here answer is 42   also, 1 2 3 4 5 6 7 8 9 10 11 12 13 also suffices, where x = 1, from which the answer is again 42   ANSWER:42
<result>D</result>
Series T is a sequence of numbers where each term after the first term is x greater than the term that precedes it. If the sum of the first and last terms of series T is 14, then what is the sum of the first three terms of series T and the last three terms of series T?