SOLUTION: 3. Find an expression for a function that takes a real number f(x) and performs the following three steps in the order given: (1) multiply by 2 (2) subtract 4 (3) take the sq

Algebra ->  College  -> Linear Algebra -> SOLUTION: 3. Find an expression for a function that takes a real number f(x) and performs the following three steps in the order given: (1) multiply by 2 (2) subtract 4 (3) take the sq      Log On


   

Question 1113334: 3. Find an expression for a function that takes a real number f(x) and performs the following three steps in the order given:
(1) multiply by 2 (2) subtract 4 (3) take the square root
Found 2 solutions by Fombitz, greenestamps:
Answer by Fombitz(32388) About Me  (Show Source):
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


Your statement of the problem is not right. f(x) is the function; it is not the real number you start with.

start with a real number x.
(1) multiply by 2: 2x
(2) subtract 4: 2x-4
(3) take the square root: sqrt(2x-4)

Answer: f(x) = sqrt(2x-4)