6 - Formulae and Functions Flashcards

1
Q

Which is an: expression, identity, formulae, equation

  1. 2x + 5 = 7
  2. A = (b x h) /2
  3. 2x + 5
  4. 2x + 5 ≡ 3x + 4
A
  1. Equation
  2. Formulae
  3. Expression
  4. Identity
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2
Q

if f(x) = 3x - 2 and g(x) = x² then what is

  1. f-1(x)
  2. f(g(x))
A
  1. fx - > x3, -2
    +2, /3 f-1(x) = (x+2) / 3
  2. g(x) = x² so x² -> 3x - 2 =
    f(g(x)) = 3x² - 2
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