SOLUTION: Find the domain of f(x)=7+(sqrt3x+21), and express it using interval notation. a.[-7,infinity) b.[0,infinity) c.[7,infinity) d.[21,infinity)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find the domain of f(x)=7+(sqrt3x+21), and express it using interval notation. a.[-7,infinity) b.[0,infinity) c.[7,infinity) d.[21,infinity)      Log On


   



Question 49165This question is from textbook Algebra and Trigonometry
: Find the domain of f(x)=7+(sqrt3x+21), and express it using interval notation.
a.[-7,infinity)
b.[0,infinity)
c.[7,infinity)
d.[21,infinity)
This question is from textbook Algebra and Trigonometry

Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
You can not take a square root of a negative number, so you can only take the square root of a positive number or the value of zero.
3x+%2B+21+%3E=+0
3x+%3E=+-21
x+%3E=+-7 (a.)
graph%28600%2C600%2C-10%2C10%2C-10%2C10%2C7%2Bsqrt%283x%2B21%29%29