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Science,English,and math Ⅱ

No.34　17/04/30 17:20
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【The part of a minus number】

《If making use of a number dynamically,a minus number appears inevitably》

The real number means rational number like a fractional number or irrational number.

When solving an equation,if its answer was minus,it didn't used to be permitted as answer from the historic point of view. We used to think the minus number was irrational one. Its days of obscurity lasted long.

Geometric idea of the number line by Descartes removed the blot on its name. To tell the truth,the geometric idea saved the crisis of existence of an imaginary number 虚数.

【Expansion to an irrational number】

《The concept of the number extends from calculations like addition,subtraction,multiplication,and division to rational number》

There are 6 apples. If three people wants to take the apples equally,two apples have to be distributed to each of the three,but if there's one apple,then the apple has to be divided into three equally. Without the remainder,no one can figure within the range…