bonjour
g (x) = x³ + 3 x - 1
g ( -1) = 1 - 3 - 1 = - 3
g ' ( x ) = 3 x² + 3
g ' ( - 1) = 3 + 3 = 6
g ' (2) = 12 + 3 = 15
f (x) = 2 /x + 1
2/2 + 1 = 2/2 + 2/2 = 4/4 = 1
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bonjour
g (x) = x³ + 3 x - 1
g ( -1) = 1 - 3 - 1 = - 3
g ' ( x ) = 3 x² + 3
g ' ( - 1) = 3 + 3 = 6
g ' (2) = 12 + 3 = 15
f (x) = 2 /x + 1
2/2 + 1 = 2/2 + 2/2 = 4/4 = 1