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7 September, 21:27

Which value of x must be excluded from the domain of the function, y = 9 / 2 (x + 7) ?

a) - 2

b) - 7

c) 2

d) 7

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Answers (1)
  1. 7 September, 22:37
    0
    B) - 7 because the dominator must be different by 0.

    2 (x + 7) ≠ 0 |divide both sides by 2

    x + 7 ≠ 0 |subtract 7 from both sides

    x ≠ - 7
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