The first four terms in an Arithmetic sequence are
x + y , x -y, xy, X/ у in that order. What is the fifth term
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Step-by-step explanation:
a = x+y.
d = x-y - (x+y)
= x - y - x - y
= - 2y
A5 = a + 4d
= x+y + 4(-2y)
= x + y - 8y
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