ItsAlix13
ItsAlix13 ItsAlix13
  • 18-08-2016
  • Mathematics
contestada

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

Respuesta :

dalendrk
dalendrk dalendrk
  • 18-08-2016
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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