Question 613049
there are 8 terms from a6 to a14; the difference is -104 (-135 - -31)
___ so the common difference between two consecutive terms is -13 (-104 / 8)


an = -13n + ?


substitute to find the "fudge factor" ___ a6 = -13(6) + ? ___ -31 = -78 + ? ___ 47 = ?


an = -13n + 47