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The 5th term of an AP is 11x-3y and the 11th term is 5x-4y. Find the 3rd term when the first term is 5
oobleck
answered
6d = (5x-4y)-(11x-3y) = -6x-y
2d = (-6x-y)/3
a3 = a5-2d = 11x-3y - (-6x-y)/3 = 13x - 8/3 y