F.1 Maths Algebra (數學 代數)

2010-10-16 7:16 pm
幫我解解這幾條問題。(幫我解做中文tim!)

Algebraic Expression , no.of terms , coef.of 'X' , constant term

1. 2X(二次方)+9X-6 , ________ , ________ , ___________
2. X(二次方)-2X , _________ , ________ , ___________
3. 6-2X+9y-z , __________ , ________ , ____________
4. 3a-6b+7x-4y+20 , ___________ , ________ , _____________



Algebraic Expression , like terms

e.g. 5a+3b-2b+a , 5a,a / 3b,-2b
1. 9ac+6bc-2ac+3-2a+b , ________________________
2.9xy+yx-2x(二次方)y(二次方)+3x(3次方)y-y(3次方)x ,
______________________________________________________




PLX!!!!!!!!!!!!!!!!!!!!!!!!

回答 (1)

2010-10-17 1:22 am
✔ 最佳答案
Algebraic Expression , no.of terms , coef.of 'X' , constant term純數式

1. 2X(二次方)/+9X/-6 , ___3_____ , ____+9____ , ______-6_____
2. X(二次方)/-2X , ____2_____ , _____-2___ , ____0_______
3. 6/-2X/+9y/-z , ______4____ , ____-2____ , ____6________
4. 3a/-6b/+7x/-4y/+20 , ___5________ , ___7_____ , _____20________



5a+3b-2b+a , 5a,a / 3b,-2b
1. 9ac/+6bc/-2ac/+3/-2a/+b , _____9ac,-2ac___________________
2.9xy/+yx/-2x(二次方)y(二次方)/+3x(3次方)y/-y(3次方)x ,

9xy, +yx( +yx=+xy)

2010-10-16 17:23:12 補充:
term= monomial
Monomial定義為:
1. a number( can be 正/負)
2.一個未知數自乘n次(n=所有數字,不包括未知數)
3.數字&未知的商

2010-10-16 17:25:07 補充:
coef= coefficient
times X 的果個數字( 好似6X, coefficient=6/ -6X,coefficient=-6)

2010-10-16 17:27:16 補充:
constant term= 只有數字, 沒有未知

2010-10-16 17:30:38 補充:
like terms=相似的TERM
定義: 某TERM 與另一TERM 含相同的未知數額指數值(即N 次方果D)


(EG.2ab, 4ab係like term)
(2y(3次方), -7y(3次方)係like term)

(但2ab, 4ab(3次方)唔係like term)

2010-10-16 17:31:23 補充:
呢d係我上堂好用心抄筆記的資料
參考: , 我學校都教緊^^, 我學校都教緊^^


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