maths F.4

(2x-1)(-2/3) = 4
1 / (2x-1)(2/3) = 4
左右開方
1 / (2x-1)(1/3) = 2
(1 / (2x-1)(1/3))3 = 23
1 / (2x – 1) = 8
2x – 1 = 1/8
2x = 9/8
x = 9/16

先解決次方的負號
1/(2x-1)^(2/3)=4

把(2x-1)^(2/3)乘過4那邊去
1=4*(2x-1)^(2/3)

變成
(2x-1)^(2/3)=1/4

同時玩兩邊的次方
(2x-1)^(2/3)(3/2)=2^-2(3/2)
2x-1=2^-3
2x=1.125
x=0.5625

(2x-1)^(-2/3) = 4

(2x-1)^(-3)=2 OR (2x-1)^(-3)=-2

1/(2x-1)=8 OR 1/(2x-1)=-8

0=16x-9 OR 0=-16x+7

x=9/16 OR x=7/16

2007-06-01 21:29:14 補充：
記住開方之後有正負如果唔係就好似第一個答者, 只得一個 answer, 漏左一個answer