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If (1+x+x2)n=a0+a1x+a2x2+...+a2nx2n, and E1=a0+a3+a6+..., E2=a1+a4+a7+..., E3=a2+a5+a8+..., then |
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Answer» If (1+x+x2)n=a0+a1x+a2x2+...+a2nx2n, and E1=a0+a3+a6+..., |
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