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

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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