Explications étape par étape:
a) 4
4 + 1 = 5
5² = 25
25 - 4² = 25 - 16 = 9
b) x
x + 1
(x + 1) ² = x² + 2x + 1
x² + 2x + 1 - x² = 2x + 1
c).vu en b)
d)f(x) = 2x + 1 f(0) = 2×0 + 1 = 1
e) 2x + 1 = 5
2x = 5-1 = 4
x = 4/2 = 2 f(2) = 5
Je te laisse tracer le graphique .
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Explications étape par étape:
a) 4
4 + 1 = 5
5² = 25
25 - 4² = 25 - 16 = 9
b) x
x + 1
(x + 1) ² = x² + 2x + 1
x² + 2x + 1 - x² = 2x + 1
c).vu en b)
d)f(x) = 2x + 1 f(0) = 2×0 + 1 = 1
e) 2x + 1 = 5
2x = 5-1 = 4
x = 4/2 = 2 f(2) = 5
Je te laisse tracer le graphique .