# Yahoo Web Search

1. ### let f(x) be a function with the following two properties : a.) for any two real numbers x and y, f(x+y)=x+f(y).?

f(2009+0) = 2009 +f(0) = 2011. I arrived a few seconds after michy, but I agree with him.

5 Answers · Science & Mathematics · 19/02/2009

2. ### properties of functions?

Commutativity: with real numbers: x + y = y + x. The order of the addition is not important...

2 Answers · Science & Mathematics · 21/08/2008

3. ### Which property of real numbers says that these two expressions are equivalent?

Left Distributive Property of Multiplication over Addition

1 Answers · Science & Mathematics · 01/02/2013

4. ### How to prove that there exists a rational number between any two real numbers?

...a nice proof. Suppose that r and s are two real numbers, and without loss of generality, suppose that...0. Because of the "Archimedian property " of the integers, we can find an integer q...

4 Answers · Science & Mathematics · 15/02/2013

5. ### How do I show that S, an uncountable subset of the reals , has the in-between property ?

...work, you could simply let x and y be any two points in your set ... a continuous interval subset of the real numbers, then clearly (x+y)/2 will... arbitrary then the in-between property is satisfied. Edit...

1 Answers · Science & Mathematics · 05/05/2013

6. ### create a quadratic function with a minimum point, two positive real roots, and a y-intercept of 12.?

...multiply by 6 and get y = 6(x-1)(x-2) for a quadratic function with two real roots and y-intercept 12. It opens upward... y = (x-3)(x-4) which has all the required properties without adjustment.

1 Answers · Science & Mathematics · 28/09/2010

7. ### Let f(x) be a function with the following two properties : (click for more details)?

f(2009) = f(2009 + 0) = 2009 + f(0) = 2009 + 2 = 2011.

1 Answers · Science & Mathematics · 16/10/2009

8. ### prove that between any two real numbers there exists a rational number.?

... on the "Archimedian property " of the real numbers. That is: for... between a and b. For the second part, do the same proof for real numbers b...

2 Answers · Science & Mathematics · 19/09/2012

9. ### give at least five properties of real numbers?

... the expression. #4. Density property The density property tells us that we can always find another real number that lies between any two real numbers. For example, between 5.61 and 5.62, there...

1 Answers · Science & Mathematics · 04/08/2007

10. ### Properties of Real Numbers, help?

...y < 1/x. Obviously 3 < 4, so from the second property 1/4 < 1/3, From the first property , -1/4 > -1/3...

3 Answers · Science & Mathematics · 12/08/2011