1.(p-q)(x+r)=(p+q)(x-r)
2.C=620 P=500 n=6
C=P(1+nr/100) find r
3.k=4/ab-1/c find b
急問3題數學題~10!!
2006-11-17 2:08 am
回答 (7)
2006-11-17 2:23 am
✔ 最佳答案
1. px+pr-qx-qr=px-pr+qx-qr2pr-2qx=0
pr-qx=0
2 . 620=500(1+6r/100)
620/500=1+6r/100
(620/100-1)x100/6=r
r =520/6
=260/3
3. 4c-ab=kabc
4c-ab+kabc=o
4c-b(a-kac)=0
b=4c/a-kac
hard working!
2006-11-17 3:07 am
第一題不明白問什麼
2. C=620 P=500 n=6
C=P(1+nr/100) find r
620=500( 1+ 6r/100 )
620=500+30r
30r=120
r=40
3. k=4/ab-1/c find b
abck=4c - ab
abck + ab = 4ck
b( ack + a ) = 4ck
b = 4ck / (ack+a)
b = 4ck / a(ck+1)
2. C=620 P=500 n=6
C=P(1+nr/100) find r
620=500( 1+ 6r/100 )
620=500+30r
30r=120
r=40
3. k=4/ab-1/c find b
abck=4c - ab
abck + ab = 4ck
b( ack + a ) = 4ck
b = 4ck / (ack+a)
b = 4ck / a(ck+1)
參考: 自己
2006-11-17 2:28 am
我只解出第二題
620= 500(1+ 6r/100)
620/500 = 1+ 6r/100
620/500 - 1 = 6r/100
12/50 = 6r/100
12/50 x 100 = 6r
6r = 24
r = 4
620= 500(1+ 6r/100)
620/500 = 1+ 6r/100
620/500 - 1 = 6r/100
12/50 = 6r/100
12/50 x 100 = 6r
6r = 24
r = 4
2006-11-17 2:21 am
ed澳數好難boo(奇),
上面的二位小朋友好傻,澳數(中學程度的數)都唔識,仲話ed係英文,唉,真係...
上面的二位小朋友好傻,澳數(中學程度的數)都唔識,仲話ed係英文,唉,真係...
2006-11-17 2:20 am
2.620=500(1+6r/100)
620=500+30r
120=30r
r = 4
3. k=4/ab-1/c
abc=4ck-abk
4ck=-abk-abc
4ck=b(-ak-ac)
b= 4ck/-a(k+c)
620=500+30r
120=30r
r = 4
3. k=4/ab-1/c
abc=4ck-abk
4ck=-abk-abc
4ck=b(-ak-ac)
b= 4ck/-a(k+c)
2006-11-17 2:16 am
Sorry I do not know what are you say ?
2006-11-17 2:13 am
I do not know what are you say ?
Your 問題 is English not Maths.
Your 問題 is English not Maths.
收錄日期: 2021-04-12 17:52:30
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061116000051KK02580