设数列an,bn满足an+bn=2n+(2/2^n),an-bn=2n-(2/2^n)(n属于R）若cn=an*bn,求数列an前n项和

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**设数列an,bn满足an+bn=2n+(2/2^n),an-bn=2n-(2/2^n)(n属于R）若cn=an*bn,求数列an前n项和**

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设数列an,bn满足an+bn=2n+(2/2^n),an-bn=2n-(2/2^n)(n属于R）若cn=an*bn,求数列an前n项和

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