bjr
ex 2
f(x) = -4x + 11
f(-3) = -4*(-3) + 11 = 23
que vaut x pour f(x) = 39 ?
-4x + 11 = 39
-4x = 28
x = -7
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bjr
ex 2
f(x) = -4x + 11
f(-3) = -4*(-3) + 11 = 23
que vaut x pour f(x) = 39 ?
-4x + 11 = 39
-4x = 28
x = -7