Mathematics
Grade10
Easy

Question

Given f(x) = 2x+ 4x and g(x) = 2x , find straight f over straight g

  1. x + 4
  2. x + 2
  3. x - 2
  4. x - 4

Hint:

open parentheses straight f over straight g close parentheses left parenthesis straight x right parenthesis equals fraction numerator straight f left parenthesis straight x right parenthesis over denominator straight g left parenthesis straight x right parenthesis end fraction

The correct answer is: x + 2


    Given f(x) = 2x+ 4x and g(x) = 2x
    open parentheses straight f over straight g close parentheses left parenthesis straight x right parenthesis equals fraction numerator straight f left parenthesis straight x right parenthesis over denominator straight g left parenthesis straight x right parenthesis end fraction equals fraction numerator 2 straight x squared plus 4 straight x over denominator 2 straight x end fraction equals fraction numerator 2 straight x left parenthesis straight x plus 2 right parenthesis over denominator 2 straight x end fraction equals straight x plus 2

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