各位知識朋友 , 入黎幫我手 ar !!!
我有數學問題唔識 , 幫手解答 ar( 數學F.2 )!!!!!!!!!!!!!!! (要步驟)
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<趕`後日交`40 marks> 各位知識朋友 , 入黎幫我手 ar !!! ( 數學F.2 ) (2)
2008-10-11 11:08 pm
回答 (2)
2008-10-11 11:25 pm
✔ 最佳答案
1) b=2x+(1-x)a
b=2x+a-ax
b-a=2x-ax
b-a=x(2-a)
(b-a)/(2-a)=x
x=(b-a)/(2-a)
2)
a=b+(c/x)
a-b=c/x
x(a-b)=c
x=c/(a-b)
3)
h=a+r(1+p^2)
8=6+r(1+(-4)^2))
2=r(1+16)
2=17r
2/17=r
r=2/17
答案入面既括號唔洗要
只不過係方便你睇
參考: 好詳細....
2008-10-11 11:24 pm
1.
b = 2x + (1 -x)a
b = 2x + a - ax
ax - 2x = a - b
(a - 2)x = a - b
x = (a - b)/(a - 2)
2.
a = b + (c/x)
Multiply each term on both sides by x:
ax = bx + c
ax - bx = c
(a - b)x = c
x = c/(a - b)
3.
h = a + r(1 + p2)
8 = 6 + r(1 + (-4)2)
8 = 6 + 17r
17r = 2
r = 2/17
=
b = 2x + (1 -x)a
b = 2x + a - ax
ax - 2x = a - b
(a - 2)x = a - b
x = (a - b)/(a - 2)
2.
a = b + (c/x)
Multiply each term on both sides by x:
ax = bx + c
ax - bx = c
(a - b)x = c
x = c/(a - b)
3.
h = a + r(1 + p2)
8 = 6 + r(1 + (-4)2)
8 = 6 + 17r
17r = 2
r = 2/17
=
收錄日期: 2021-04-25 19:47:01
原文連結 [永久失效]:
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