Question

show by taking example that the sum of two rational number may or may not be an irrational number

Answer 1

1. I know this statement is false (if I am correct) but how to prove it's false?

"The sum of two rational numbers is irrational."

2. I know this statement is true (if I am correct) but how to prove it's true?

"The sum of two irrational numbers is irrational"

I used the example 2–√+3–√=3.142+3=3.14

But i may need to use proof by contradiction or contaposition.

Answer 2

The International Meridian Conferencewas a conference held in October 1884 in Washington, D.C., in the United States, to determine a prime meridian for international use.[1] The conference was held at the request of U.S. PresidentChester A. Arthur. The subject to discuss was the choice of "a meridian to be employed as a common zero of longitude and standard of time reckoning throughout the world".[1] It resulted in selection of the Greenwich Meridian as the international standard for zero degrees longitude.[1]

International Meridian Conference

The vertical red line left of the middle is the Greenwich meridian.

Host country United StatesDate1 October 1884[1]CitiesWashington, D.C.ChairC. R. P. Rodgers[1]Key points

Establishment of Universal Time

Agreement of the Greenwich meridianas the international standard for 0° longitude