Question

Dada a função f (x) = x . -3x, determine:

a) f (-3)=
b) f (0)=
c) f (+3) =
d) f (1/2)
e) ( raiz de 2)

Answer 1

 f (x) = x . -3x, determine:

a) f (-3)= - 3x^2 ==> -3(-3)^2 = - 3.9 ==> - 27
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b) f (0)= - 3(0)^2 ==> -3.0 = 0
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c) f (+3) = - 3x^2 ==> -3(3)^2 = 3.9 ==>  27
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d) f (1/2) = - 3x^2 ==> -3(1/2)^2 = - 3.(1/4) ==> - 3/4
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e) ( raiz de 2) - 3x^2 ==> -3(V2)^2 = - 3.2 ==> - 6