dyancey dyancey
  • 24-01-2019
  • Mathematics
contestada

I need to know the values of x that are NOT in the domain of h.

I need to know the values of x that are NOT in the domain of h class=

Respuesta :

jimrgrant1 jimrgrant1
  • 24-01-2019

Answer:

x = - 7, + 7

Step-by-step explanation:

The denominator of h(x) cannot be zero as this would make h(x) undefined. Equating the denominator to zero and solving gives the values that x cannot be.

solve :

x² - 49 = 0 ⇒ (x - 7)(x + 7) = 0 ⇒ x = ± 7

The domain is valid for all x ∈ R , x ≠ - 7, + 7


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