Yefim S. answered • 03/16/21
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n = 2; a2 = a12 - 4 = 12 - 4 = - 3
n = 3; a3 = a22 - 4 = (-3)2 - 4 = 5
n = 4; a4 = a32 - 4 = 52 - 4 = 21
Joseph J.
asked • 03/16/21if a1 = 1 and an = (an-1)^2 - 4 then find the value of a4
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