7 1 points SwokPreCalc12 24021 Find the domain of f Enter yo

7. +-1 points SwokPreCalc12 2.4.021 Find the domain of f. (Enter your answer using interval notation.) X)= Need Help? L-R ditL watch lt LTalktoa Tutor Talk to a Tutor Watch It 8. +-1 points SwokPreCalc12 2.4.024 Find the domain of f. (Enter your answer using interval notation.) Need Help? WatehTalk to uter Read It Watch It Talk to a Tutor Submit Answer Save Progress Practice Another Version

Solution

f(x) = sqrt ( 3x + 8 )

3x+8>= 0

3x>= -8

x >= -8/3

domain is [ -8/3 , infinity )

2) f(x) = sqrt ( x^2 - 64 )

x^2 - 64 >= 0

( x- 8 ) ( x+8 ) >= 0

domian is ( -infinity , -8 ] U [ 8 , infinity )