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In this article, we study the existence of sign-changing solutions for the following Schrdinger equation-△u + λV(x)u = K(x)|u|p-2u x ∈ RN, u → 0 as |x| → +∞,where N ≥ 3, λ > 0 is a parameter, 2 < p <2N N-2, and the potentials V(x) and K(x) satis