If g(x) and h(x) are two polynomials suc...

If `g(x)` and `h(x)` are two polynomials such that the polynomials `P(x)=g(x^(3))+xh(x^(3))` is divisible by `x^(2)+x+1`, then which one of the following is not true?

`g(1)=h(1)=0`

`g(1)=h(1) ne 0`

`g(1) =-h(1)`

`g(1) + h(1)=0`

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