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Sagot :

MOZI
-oo -7 0. 5/4 +oo
4x-5 - - - 0 +
x+7 - 0 + + +
(4x-5)(x+7) et p(x) + 0 - - 0 +
f(x), k(x) et t(x) - 0 +. + 0. -
h(x). + 0 - 0 - 0 +

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