Question

1- Dada a função f(x) = x² – 5x + 4, calcule:



a) f(0) b) f(– 1) c) f(1/2) d) f( √2)

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Answer 1

Resposta:

f(x) = x² – 5x + 4

a) f(0) =0-0+4

=4

b) f(– 1) =(-1)²-5*(-1)+4 = 1+5+4

=10

c) f(1/2)=(1/2)²-5/2 +4 =1/4-5/2+4 = 0,25-2,5+4

=1,75

d) f( √2) =(√2)²-5√2+4 = 2-5√2+4

=6-5√2