Algebra

I have to find the domains of these functions and don't know how:

f(x)=SQRT 2x-1

and

f(x)=3/x+4

1. 👍 0
2. 👎 0
3. 👁 39
1. Hi Bee!
No more worries :)

Domain is simply the possible values of x. Remember you cannot divide by zero, and you cannot get the square root of a negative number.
For f(x)=SQRT 2x-1
Domain=
x>0

For f(x)=3/x+4
Domain=
x cannot equal 4
All you have to do is right an equal-sign with a slash through it.

1. 👍 0
2. 👎 0
posted by Houdini
2. thanks!!

1. 👍 0
2. 👎 0
posted by Bee
3. You're welcome!

Keep those math questions coming, oddly enough, I enjoy answering them. =)

1. 👍 0
2. 👎 0
posted by Houdini

Similar Questions

1. Precalculus

Determine the domain of (f/g)(x) when f(x) = 1/x and g(x) = sqrt(x+5). I have the domains of both functions and I know how to set up (f/g)(x), but I don't know where to go from there. (f/g)(x)= (1/x)/(sqrt(x+5)) domain of f(x) =

asked by Betty on September 8, 2018
2. Math

1) Find three functions with unlimited domains and ranges. 2) Find two functions with restricted domains. 3) Find two functions with restricted ranges. Im confused as to how I can find the answer for these question, can you please

asked by Kate on July 19, 2011
3. Pre Cal

find the domains of the following functions: a) f(x)=x^20 b) g(x)=1/(x-3) c) h(x)=1/(4x^2=21x-18) d) k(x)=sqrt (4x^2-21x-18) e) p(x)=1/sqrt(4x^2-21x-18)

asked by Angela on July 24, 2011
4. Trig

Find the exact values of the six trigonometric functions 0 if the terminal side of 0 in standard position contains the points(-5,-4). (0 is not the number zero I don't know what its called) I have to find r first. r=sqrt x^2+y^2

asked by Jon on March 6, 2008
5. math

for the given functions f and g, find the specified value of the following functions and state their domains: f(x)=x-5; g(x)=2x^2 a.(f+g)(3)= b.(f/g)(3)= Can someone help me figure this out? pleeeease????

asked by asia on March 27, 2013
6. Math (repost)

Let f and g be defined by f(x) = 9-x such that 4

asked by anonymous on September 5, 2009
7. Math

Let f and g be defined by f(x) = 9-x such that 4

asked by anonymous on September 5, 2009
8. Calculus

Find the sum and difference functions f + g and f – g for the functions given. f(x) = 2x + 6 and g(x) = 2x - 6 f(x) = x^2 - x and g(x) = -3x + 1 f(x) = 3x^3 - 4 and g(x) = -x^2 + 3 State the domain and range for the sum and

asked by Bee on September 2, 2013
9. pre calculus

consider the functions f(x)=x^3-3 and g(x)=3 sqrt x+3: a. find f(g(x)) b. find g(f(x)) c. determine whether the functions f and g are inverses of each other. I really need help with these, I don't get it at all.

asked by Staci on March 27, 2013
10. algebra,math,help

Use Property 2 to simplify each of the following radical expressions. sqrt (10)/ sqrt(49) My answer: sqrt (10) / (7) THis next one i need help: Use the properties for radicals to simplify each of the following expressions. Assume

asked by jas20 on March 9, 2007

More Similar Questions