Question

Domain of √(x^2- 16) is

a. [ -4 , 4 ]
b. ( - ∞ , 4 ) U ( 4 , ∞ )
c. ( - ∞ , 4 ] U [ 4 , ∞ )
d. None of above

Answer 1

Answer:

a

Step-by-step explanation:

Answer 2

Answer: d

Step-by-step explanation:

       any thing under square root is defined only if i.e +ve

            hence  x²- 16 ≥ 0 i.e

                   (x-4)(x+4)≥0

        i.e  option d

through wavy curve method

                                     we get (- infinity, -4 ] U [4 , infinity)

   hope u got it and let me know