Considerăm funcția f : R → R, f(x) = ax + b. Ştiind că punctele A(2, 3) şi B(4, 5) sunt situate pe graficul funcției f, calculaţi f(-1).

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2 September 2025 matematica 5 minute
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Clasă: Education Materie: matematica

Considerăm funcția f : R → R, f(x) = ax + b. Ştiind că punctele A(2, 3) şi B(4, 5) sunt situate pe graficul funcției f, calculaţi f(-1).

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f : R → R, f(x) = ax + b

B(4, 5) şi A(2, 3) ∈Gf

f(4)=5 si f(2)=3

4a+b=5

2a+b=3  (-)

 2a=2   => a=1

2•1+b=3=> b=1

f(x)=x+1

f(-1)= -1+1=0

Răspunsul a fost dat în data 2 September 2025

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