**兩條好簡單既數學題目**

2007-01-02 12:12 am
**兩條好簡單既數學題目**

(1)
If s = 3 , find the values of the following algebraic expressions.
    2
( 1 - 2s )


(2)
         3rT 
Given a formula V = ----,find the value of P = 9,r = 6 and T = -3.5.
          P

第一條係整個 括狐 既二次方!
請詳細列出步驟,多謝~!
更新1:

可以用中文~

回答 (2)

2007-01-05 12:19 am
✔ 最佳答案
1.
2
(1-2s) s=3
2
=(1-2x3)
2
=(1-6)
2
=(-5)

=(-5)(-5)

=25

2.

3rT
V=一一一 P=9 r=6 T= -3.5
P

(3)(6)(-3.5)
V=一一一一一一
9

-63
V=一一一
9

63
V= - 一一一
9

V= -7
參考: myself
2007-01-02 12:19 am
    2
( 1 - 2s )

=(1-2X3)

=(-5)
=25

V= 3X6X(-3.5) / 9
= 63/9
=7


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