SOLUTION: what is a domain? and how would i figure this out? is there an easy way to solve this?? can you please help thank you very much Determine the domain of each relation. 28.

Question 59823: what is a domain? and how would i figure this out? is there an easy way to solve this?? can you please help thank you very much

Determine the domain of each relation.
28. y = \/ x-2
30. y = 4-x^2

Answer by venugopalramana(3286) (Show Source): You can put this solution on YOUR website!
OK....DOMAIN I SHALL TELL YOU..
THE VALUES X CAN TAKE TO MAKE THE FUNCTION REAL IS
DOMAIN.
EX.1
F(X)=X^2+1....X CAN TAKE ANY REAL VALUE..SO DOMAIN IS
ALL REAL NUMBERS.
IN SET NOTATION WE WRITE IT AS (-INFINITY,+INFINITY)
EX.2
G(X)=SQRT(X)
NOW IF X IS NEGATIVE THE FUNCTION BECOMES
IMAGINARY..HENCE X CANNOT BE NEGATIVE.
SO WE SAY DOMAIN OF X IS ALLREAL VALUES GREATER THAN
OR EQUAL TO ZERO.
IN SET NOTATION WE WRITE IT AS (0,INFINITY)
YOUR PROBLEM
Y = SQRT(X-2).....X-2>=0
X>=2
DOMAIN IS +2 TO INFINITY...[2,INFINITY)...[ INDICATES IT CAN EQUAL 2
RELATED QUESTIONS
I have a very frustrated child trying to figure out simplfying and expanding. Description (answered by 77536)

Please help me solve this problem: Two presidential candidates havde a total of 1882... (answered by checkley77)

I would like to know this. Is there an equation that can help me figure out the sine of... (answered by Fombitz)

hello! my name is daniela and i dont understand how to figure out this question can u... (answered by stanbon)

Please help me figure this out step by step. Spent over 2 hours on this one. I know... (answered by nerdybill)

This is actually about "unfoiling". Is there a quick and easy way to figure out the... (answered by checkley71)

Solve for theta: cos(2theta+pi) = +/- (sqrt(2)/2) [There are no restrictions, so answer (answered by Fombitz)

Is there an easy way to solve systems with 3 variables? I'm having a hard time... (answered by longjonsilver)

the following problem represents calculations of the slops. How do i solve for the... (answered by Theo)