Question

Dada função f:R R definida poe f(x)=ax+b, com a, e b, sabendo que F(4)=3ef(-2)=-7

Answer 1

Resposta:

$f(x)=ax+b$

$f(4)=3$

$f(-2)=-7$

$\left \{ {{a*4+b=3} \atop {a*(-2)+b=-7}} \right.$

$\left \{ {{4a+b=3} \atop {-2a+b=-7}} \right.$

$\left \{ {{b=3-4a} \atop {-2a+(3-4a)=-7}} \right.$

$\left \{ {{b=3-4a} \atop {-6a=-10}} \right.$

$\left \{ {{b=3-4a} \atop {a=\frac{-10}{-6} }} \right.$

$\left \{ {{b=3-4*\frac{5}{3} } \atop {a=\frac{5}{3} }} \right.$

$\left \{ {{b=-\frac{11}{3} } \atop {a=\frac{5}{3} }} \right.$

Answer 2

Resposta:

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