Question

1) Determine o valor numérico da função afim f(x) = -3x + 4 para:
a) x = 0
b) x = 1
c) x = -2
d) x = 1^3

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Answer 1

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a)

$f(x) = - 3x + 4 \\ f(0) = - 3.0 + 4 \\ f(0) = 0 + 4 \\ f(0) = 4$

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b)

$f(x) = - 3x + 4 \\ f(1) = - 3.1 + 4 \\ f(1) = - 3 + 4 \\ f(1) = 1$

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c)

$f(x) = - 3x + 4 \\ f( - 2) = - 3.( - 2) + 4 \\ f( - 2) = 6 + 4 \\ f( - 2) = 10$

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d)

$f(x) = - 3x + 4 \\ f( {1}^{3} ) = - 3.{1}^{3} + 4 \\ f( {1}^{3} ) = - 3.1 + 4 \\ f({1}^{3}) = - 3 + 4 \\ f( {1}^{3}) = 1$