ISSN : 1226-0657
We will show the general solution of the functional equation f(x + ay) + f(x − ay) + 2(a<sup>2</sup> − 1)f(x) = a<sup>2</sup>f(x + y) + a<sup>2</sup>f(x − y) + 2a<sup>2</sup>(a<sup>2</sup> − 1)f(y) and investigate the stability of quartic Lie *-derivations associated with the given functional equation.
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