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If a^2+b^2+c^2=-2\ a b n df(x)=|1+a^xx(1...

If `a^2+b^2+c^2=-2\ a b n df(x)=|1+a^xx(1+b^2)x(1+c^2)x(1+a^2)x1+b^2x(1+c^2)x(1+a^2)x(1+b^2)x1+c^2x|` , then `f(x)` is a polynomial of degree- a.`2` b. `\ 3` c.`\ 0` d. `1`

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