surd

TODAY...Definition of a Surd:The nth root of a number a is denoted as n√a (also as a1/n)Let a be a rational number and n a positive integer.Then n√a is called a Surd if it, i.e. n√ais an irrational number.n√ais spoken as “nth root of a”nthroot of a number a is a surd, if it is an irrational number.
Examples of Surds:2√2 or just √2 is a surd.3√9, 3√16, 4√25, 5√100 are all numbers whose given roots are not rational numbers. They are therefore Surds.


Comments

Post a Comment

Popular posts from this blog

Types of Learning Disabilities

Each day, the millions of children with learning disabilities face tasks that, for reasons unknown to them, never become automatic and always seem to stand in the way of their progress as students. For parents and teachers of a struggling child, the picture is not much clearer or any less frustrating. Specific learning problems are difficult to identify; their causes are generally unknown; and the long-term effects are hard to predict. Learn to recognize and understand different types of learning disabilities in order to thoughtfully and efficiently take the best course of action for a struggling learner. Choose an area of difficulty: Writing Reading Dyslexia Math Attention
Read more

MEASUREMENTS

Image
METRIC SYSTEM OF MEASUREMENT: The metric system is a  system of measuring . It has three main units: m   the  metre  for length kg   the  kilogram  for mass s   the  second  for time With those three simple measurements we can measure  nearly everything  in the world! Examples: Metre The  length  of this guitar is about  1 metre :   When unfolded this ruler measures  2 metres :       Kilogram This gold bar has a mass  of  1 kilogram . A dictionary also has a mass of about  1 kilogram . Second 1 second  is about as long as it takes to say  "one thousand and one"   Larger or Smaller But what if we want to talk about really big or really small things? Answer: we can use  Metric Number Prefixes like "kilo" (a thousand) and "milli" (one thousandth) and so on Examples: something that is 1,000 metres is a " kilo m...
Read more

Railway time and ordinary time

Image
Railway time  was the standardised time arrangement first applied by the  Great Western Railway  in England in November 1840, the first recorded occasion when different  local mean times  were synchronised and a single  standard time  applied. Railway time was progressively taken up by all railway companies in Great Britain over the following two to three years. The schedules by which trains were organised and the time  station clocks  displayed were brought in line with the local mean time for London or "London Time", the time set at  Greenwich  by the  Royal Observatory , which was already widely known as  Greenwich Mean Time  (GMT). Ordinary Time  comprises two periods of time in the  Christian   liturgical year  that are found in the calendar of the ordinary form of the  Roman Rite  of the  Catholic Church , as well as some other churches of  Western Christianity , includ...
Read more