| Q. | How to prove that if gcd(a,b)=1 and gcd(a,c)=1 then gcd(a,bc)=1 ? | Related Search:
Mathematics | | | How to prove that if gcd(a,b)=1 and gcd(a,c)=1 then gcd(a,bc)=1 using the hint ax + by = 1
| | A. | GCD(a,b)= 1
so 1 = ax + by
so c = acx + bcy ...1
now GCD(a,c) = 1
so 1 = ma+ nc = ma + n(acx+ bcy) ftom 1
= a ( m + ncx) + bc(ny)
as we can put 1 as linear combination of a and bc so Gcd(a,bc) = 1
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| Q. | Has anyone here gotten pregnant from missing 1 BC pill? | Related Search:
Pregnancy | | | I was just wondering because I missed 1 BC pill (well I'm pretty sure I threw the pill up) and I wanted to know how likely it would be to get pregnant from missing the 1 pill. I am nervous because according to an ovulation calculator, I was probably ovulating right around the time I missed the pill.
| | A. | It's not very likely. The pack of pills should have instructions for what to do if that happens. Though most don't say anything about using a back-up method unless you have missed, or thrown-up, 2 pills. | | | |
| Q. | What was the population of Israel around 1 BC ? | Related Search:
History | | | I would like to know the population of Israel at the time Jesus was born. Just give me an approximate number.
More than 100,000 ?
More than 500,000 ?
More than 1,000,000 ?
More than 5,000,000 ?
| | A. | the estimation talk about 2 million Jews living in Israel prior to the 70Ad rebellion. this is probably the amount also 70 years prior to that.
I don't know how many non-Jews were in Israel at that time - but they were minority (otherwise, Jews couldn't be in power)
historical records based on tax payment reveal that about half million Jews were killed in the second rebellion fights,
about that amount sold to slavery (prices of slaves plummeted),
and many of the remaining Jews fled.
so after 120 AC, less then half a million Jews remained in Israel. | | | |
| Q. | Has anyone had mild bleeding shortly after missing 1 BC pill, but before the pack was done? | Related Search:
Pregnancy | | | I missed one pill last night, then today I started bleeding really lightly with really light cramps, but I still have six pills left. What does this mean?
| | A. | It's normal. Especially with the pills for the 3rd week. You should still get a normal period. | | | |
| Q. | How many humans have lived since since 1 BC? | Related Search:
Anthropology | | | Including number of people currently alive today approximately how many humans have lived and died from 1BC until current day?
| | A. | There have not always been 6 billion people in the world. In fact, we didn't hit one billion until about 1804, and not two billion until 1927. The population has, without hyperbole, exploded in the last two hundred and fifty years. The thirty year gap between generations is also very new (and optimistic... I'd put it closer to 20 or 25).
Around 1 BC, the world population was more like 100 million, and new generations were less than 20 years apart. The best estimates of the total population of all of history is about 90-110 billion, but that includes about 10,000 years before 1 BC. As a rough estimate, I'd say probably 50-60 billion since 1 BC, but that's very very rough. | | | |
| Q. | How far apart should the nails be when applying 1/4" BC board to OSB subflooring? | Related Search:
Maintenance & Repairs | | | Im putting down 1/4" BC board to a new outbuilding with an OSB subfloor and I wanted to know if there was a recommendation about how far apart, how many, etc. nails should be nailed.
| | A. | 6"OC | | | |
| Q. | History of Saudi Arabia from 3000 BC to 1 AD? | Related Search:
History | | | Which cultures or civilizations existed in Saudi Arabia between the years 3000 BC and 1 AD? What land did they occupy from the now Saudi Arabia. Was the civilization a superpower at all in the region? Were there just tribes living in Saudi Arabia during those times, if so, then which ones?
I am really wanting to learn about the history of this world, and Saudi Arabia is a place that I want to learn about first. I will be moving onto the rest of the Middle East, and then to Africa afterwards. Thanks for answering!
Could someone please answer, even if it is a link.
| | A. | There's this:
"Until comparatively recent times knowledge of the Arabian Peninsula was limited to that provided by ancient Greek and Roman writers and by early Arab geographers; much of this material was unreliable. In the 20th century, however, archaeological exploration has added considerably to the knowledge of the area.
The earliest known events in the history of the Peninsula are migrations into neighbouring areas [1]. Around 2500 BC, Semitic-speaking peoples of Akkadian origin migrated from the Arabian Peninsula into the valley of the Tigris and Euphrates rivers in Mesopotamia,[2] mixed with the Sumerians, and became the Assyro-Babylonians.[3][4] Some archeologists argue that another group of Semites left Arabia around 2500 BC during the Early Bronze Age and settled along the Levant, mixing in with the local populations there. Some of these migrants became the Amorites and Canaanites of later times.
Bernard Lewis mentions in his book The Arabs in History:
"According to this, Arabia was originally a land of great fertility and the first home of the Semitic peoples. Through the millennia it has been undergoing a process of steady desiccation, a drying up of wealth and waterways and a spread of the desert at the expense of the cultivable land. The declining productivity of the peninsula, together with the increase in the number of the inhabitants, led to a series of crises of overpopulation and consequently to a recurring cycle of invasions of the neighbouring countries by the Semitic peoples of the peninsula. It was these crises that carried the Assyrians, Aramaeans, Canaanites (including the Phoenicians and Hebrews), and finally the Arabs themselves into the Fertile Crescent."[5]
The better-watered, higher portions of the extreme south-west portion of the Arabian Peninsula supported three early kingdoms. The first, the Minaean, was centered in the interior of what is now Yemen, but probably embraced most of southern Arabia. Although dating is difficult, it is generally believed that the Minaean Kingdom existed from 1200 to 650 BC The second kingdom, the Sabaean (see Sheba), was founded around 930 BC and lasted until around 115 BC; it probably supplanted the Minaean Kingdom and occupied substantially the same territory. The Sabaean capital and chief city, Ma’rib, probably flourished as did no other city of ancient Arabia, partly because of its controlling position on the caravan routes linking the seaports of the Mediterranean with the frankincense-growing region of the Hadhramaut and partly because a large nearby dam provided water for irrigation. The Sabaean Kingdom was widely referred to as Saba, and it has been suggested that the Queen of Sheba mentioned in the Bible and the Quran, who visited King Solomon of Israel in Jerusalem in the 10th century BC, was Sabaean. The Himyarites followed the Sabaeans as the leaders in southern Arabia; the Himyarite Kingdom lasted from around 115 BC to around AD 525. In 24 BC the Roman emperor Augustus sent the prefect of Egypt, Aelius Gallus, against the Himyarites, but his army of 10,000, which was unsuccessful, returned to Egypt. The Himyarites prospered in the frankincense, myrrh, and spice trade until the Romans began to open the sea routes through the Red Sea."
Saudi Arabia was never much of a "superpower" until the coming of Muhammed and the subsequent caliphs. But even then, the center of the Islamic conquests shifted quickly from Arabia to Damascus, Baghdad, Egypt and finally Turkey.
In those times, there was only the Arab Peninsula; it wasn't divided into countries, such as Yemen, The Kingdom of Saudi Arabia, Oman, Kuwait, the Emirates, etc. as it is today. It had no central ruler but was primarily a tribal, nomadic society
By the way, I lived and worked in Saudi Arabia (Jeddah and Riyadh) for 19 years. Let me know if you need any information about The Kingdom. | | | |
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