Question

Seja f; IR ⇒IR a função dada por f (x)=(x^2+1)/x qual e o valor de f(3) f(1sobre3)

Answer 1

f(x) = (x² + 1) / x

(I)
f(3) = (3² + 1) / 3
f(3) = (9 + 1 ) / 3
f(3) = 10/3

(II)
f(1/3) = ((1/3)² + 1) / (1/3)
f(1/3) = ((1/9) + 1) / (1/3)
f(1/3) = (10/9) / (1/3)
f(1/3) = 30/9
f(1/3) = 10/3