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Question #44,708

Q.If ((()) n 2 2 2n 0 1 2 2n 1 x x a a x a x.... a x − + = + + + + − + = + + + + − + = + + + + − + = + + + + then ((()) 0 2 4 2n a a a.... a + + + + + + + + + + + + + + + + is equal to