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Sagot :

JPMORIN3

bjr

f(x) = -2x - 7

f(x₀) = -2x₀ - 7

f(x₀ + h) = - 2 (x₀ + h) - 7

f(x₀ + h) - f(x₀) = - 2 (x₀ + h) - 7 - (-2x₀ - 7)

                      = -2x₀ -2h - 7 + 2x₀ + 7

                      -2h

[f(x₀ + h) - f(x₀)] / h = -2h/h = -2

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