If rational number a,b,and c satisfy a＜b＜c,then｜a-b｜+｜b-c｜+｜c-a｜﹦?

If rational number a,b,and c satisfy a＜b＜c,then｜a-b｜+｜b-c｜+｜c-a｜﹦? 英语翻译A set of integers that is bounded from below contains a least element.这是什么定理?全文是这样的：Show that between any two different real numbers there is a rational number.(Hint:If a0,so there is a natural number n such that If two rational number x,y satisfy |x|+y=3 and |x|y+x*x=0 ,then x=___ y=___? 有人可以给我解释一下RATIONAL 和IRRATIONAL NUMBER的区别吗rational number and irrational number If 120 is three tenths of a number,the number Is a long-distance relationship rational? If you read a two digits number backwards,you gets a 4.5 times greater number.Find this number.只要结果 If a,b,c,d are rational numbers(有理数),|a-b|≤9,|c—d|≤16 and |a-b-c+d|=25If a,b,c,d are rational numbers(有理数),|a－b|≤9,|c—d|≤16 and |a－b－c+d|=25,then |b－a|-|d—c|= ． If you see a fire.you can call ( ) number 119 if you take away half of a number是什么意思 英语翻译if 17 more than a number is 5 more than three times the number,what is the number? a number is added to 9 less than twice that number,if the result is 180,what is the number? if 4 less than 3 times a certain number is 2 more than the number,what is the number If 25% of a number is 324 less than 70% of the same number,what is the number? 英语翻译If f less than 3 times a certain number is 2more than the number,what is the number? If 1/5 of a number is 12,What is 3/10 of the same number? 怎样理解有理数 rational number可写成两个整数的比 The steady rise in international crude oil prices has spurred the introduction of a number of national energy efficiency programmes by countries in the region,such as Energy Efficiency Programme in Nicaragua with US$920,000 and Programme for Rational