On definit les ofnctions suivante sur l'intervalle I=[0;8]

U(x)=x²+6x-7 ; F(x)=|u(x)| G(x)=0,625x²-5x+5

resoudre u(x)>0 et en deduire l'expression de f(x) sans valeur absolue.

-Resoudre l'inequation F(x)>G(x) (sur l'intervalle [0;7] puis [7;8]

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