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We obtain for $\\gamma\\in(1,\\frac{n}{n-2p})$ that any nonconstant solution satisfying certain growth at infinity is radial symmetric about some point in $\\mathbb{R}^{n}$ and monotone decreasing in the radial direction. 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We obtain for $\\gamma\\in(1,\\frac{n}{n-2p})$ that any nonconstant solution satisfying certain growth at infinity is radial symmetric about some point in $\\mathbb{R}^{n}$ and monotone decreasing in the radial direction. 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