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a in (-oo:+oo)
3000 = (1/2)*a^(14^2) // - (1/2)*a^(14^2)
3000-((1/2)*a^(14^2)) = 0
(-1/2)*a^(14^2)+3000 = 0
-1/2*a^196 = -3000 // : -1/2
a^196 = 6000
a^196 = 6000 // ^ 1/196
abs(a) = 6000^(1/196)
a = 6000^(1/196) or a = -6000^(1/196)
a in { 6000^(1/196), -6000^(1/196) }
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