Question

Dada a função f:R -> R definida por f(x)= 2x - 1/3, calcule:

a) f(0) b) f(-2)

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Answer 1

$f(x)=2x- \dfrac{1}{3}\\\\\\ f(0)= 2\cdot0-\dfrac{1}{3} \\\\ f(0)=0- \dfrac{1}{3}\\\\ \Large\boxed{f(0)=- \dfrac{1}{3}}\\\\\\ f(-2)=2\cdot(-2)- \dfrac{1}{3}\\\\ f(-2)=-4- \dfrac{1}{3}\\\\ \boxed{f(-2)=- \dfrac{13}{3}}$