數學number system

2012-09-02 5:48 pm
1幫我解下段野
all integers,fractions,terminating decimals and recurring decimals can each be expressede as a ratio of two integers,i.e. p/q,where p,q are integers and q =/= 0. all these munbers are called rational munbers.

2 幫我解釋一下複數是什麼
點樣分別 complex number,real number,imaginary number

因為書用英文 我有d唔明 thx!!

回答 (1)

2012-09-02 6:42 pm
✔ 最佳答案
1幫我解下段野
all integers,fractions,terminating decimals and recurring decimals can each be expressede as a ratio of two integers,i.e. p/q,where p,q are integers and q =/= 0. all these munbers are called rational munbers.
所有整數、分數、有限小數和循環小數都可以被寫成兩個整數的比例,即p/q。當中的p和q都是整數,而且q不等於0。這些數都被稱為有理數。

2 幫我解釋一下複數是什麼
點樣分別 complex number,real number,imaginary number
complex number:複數,可寫成a+bi,當中的a和b是實數(不論有理還是無理),而i是虛數,即i^2=-1
real number:實數,包括所有有理數和無理數
imaginary number:虛數,即i,又名假想數
參考: me, book


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