Question

Me ajudem com esses exercícios pfvrr

Answer 1

Explicação passo-a-passo:

f(x) = x² - x + 2

a) f(0) = 0² - 0 + 2

   f(0) = 0 - 0 + 2

   f(0) = 2

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b) f(2) = 2² - 2 + 2

   f(2) = 4 - 2 + 2

   f(2) = 4

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c) f(-3) = (-3)² - (-3) + 2

   f(-3) = 9 + 3 + 2

   f(-3) = 14

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d) f(1/3) = (1/3)² - 1/3 + 2

   f(1/3) = 1/9 - 1/3 + 2

   f(1/3) = (1 - 3 + 18) / 9

   f(1/3) = 16/9

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e) f(- 1/3) = (- 1/3)² - (- 1/3) + 2

   f(- 1/3) = 1/9 + 1/3 + 2

   f(- 1/3) = (1 + 3 + 18) / 9

   f(- 1/3) = 22/9

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f) f(1/5) = (1/5)² - 1/5 + 2

  f(1/5) = 1/25 - 1/5 + 2

  f(1/5) = (1 - 5 + 50) / 25

  f(1/5) = 46/25

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f(x) = x + 2x - 1

        3

a) f(1) = 1/3 + 2 . 1 - 1

   f(1) = 1/3 + 2 - 1

   f(1) = (1 + 6 - 3) / 3

   f(1) = 4/3

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b) f(3) = 3/3 + 2 . 3 - 1

   f(3) = 1 + 6 - 1

   f(3) = 6

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c) f(-3) = -3/3 + 2 . (-3) - 1

   f(-3) = -1 - 6 - 1

   f(-3) = -8

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d) f(1/6) = 1/6 / 3 + 2 . (1/6) - 1

   f(1/6) = 1/18 + 1/3 - 1

   f(1/6) = (1 + 6 - 18) / 18

   f(1/6) = - 11/18

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e) f(- 1/4) = - 1/4 / 3 + 2 . (- 1/4) - 1

   f(- 1/4) = - 1/12 - 1/2 - 1

   f(- 1/4) = (-1 - 6 - 12) / 12

   f(- 1/4) = - 19/12