1 = 2 ???????? (考你的數學能力)
如果a=b且a,b>0,則1=21)a,b>0 已知
2)a=b 已知
3)ab=b2 第2步“=”的兩邊同“*”
4)ab-a2=b2-a2 第3步“=”的兩邊同“-”
5)a(b-a)=(b+a)(b-a) 第4步的兩邊同時分解因式
6)a=(b+a) 第5步“=”的兩邊同“/”
7）a=a+a 第2，6步替換
8)a=2a 第7步同類項相加
9)1=2 第8步“=”的兩邊同“/”
各位仁兄，你們知道這等式是正確還是錯誤，如是錯誤，那又是錯在那裏 阿仁兄...
第五步已經錯左... Do your own howework dude. -___-" 5)a(b-a)=(b+a)(b-a) --- b-a=0
6)a=(b+a) ---- you mean: a/0=(b+a)/0 因為唔可以兩邊同時除0~~~ 6 is wrong
if a=b only one way a=a+b is b is 0, since ab >0 , b can't be 0 the if statment is wrong Don't know what are you doing. Anyone know maths will not write these steps! 第3步已經錯左la
a=b
同埋a,b都大過0
我設a=b=3
咁ab =\= b2
ab=(3)(3)=9
(3)2=6
呢d步驟真係教壞細路 [quote]Originally posted by [i]pigcat[/i] at 2005-3-17 07:21 PM:
第3步已經錯左la
a=b
同埋a,b都大過0
我設a=b=3
咁ab =\= b2
ab=(3)(3)=9
(3)2=6
呢d步驟真係教壞細路 [/quote]
i think he means ab = b^2
so this step is right
have to ask him to confirm..lol 如果a=b且a,b>0,則1=2
1)a,b>0 已知
2)a=b 已知
第3, 4 ,5, 6, 7, 8 有無錯我就吾知,但一樣計到 1=2
AB =AA
AB =2 A
如果 A=1 B一樣 =1
1 X 1= 2 X 1
1 = 2 believe some one who posts those are really BAD in MATHS [quote]Originally posted by [i]wb_taz[/i] at 2005-3-18 11:22 PM:
如果a=b且a,b>0,則1=2
1)a,b>0 已知
2)a=b 已知
第3, 4 ,5, 6, 7, 8 有無錯我就吾知,但一樣計到 1=2
AB =AA
AB =2 A
如果 A=1 B一樣 =1
1 X 1= 2 X 1
1 = 2 [/quote]
u are wrong.. dude
AB=AA
AB= A^2 not 2A
therefore, A=1 and B=1
equal 1x1=1^2
and 1=1 that's tricky.........
those steps make u cofused with the real number (1&2) and symbol (a&b), the final step 1&2 are actually the a&b u assumed at the beginning...... step 6 is wrong.. so the following steps are all wrong 1)a,b>0 已知
2)a=b 已知
3)ab=b^2
4)ab-a^2=b^2-a^2
5)a(b-a)=(b+a)(b-a)
6)a=(b+a) <-------未知數約o左咁計d乜呢?
7)a=(a+a) <-------咁點解唔起第5part 到代入 a(a-a)=(a+a)(a-a)
a(0)=(2a)(0)
0=0<---恆等式
都講o左a=b,又點會1=2 呢,咁證出o黎ge答案未錯lor~都唔岩a=b!!
a=b a,b>0 咁即係大過0就係答案la~ 1=1,2=2,3=3........
同埋我覺得a=b係條件~唔係一條公式,如果用a=b o黎計..咁我又用番a=b(已知),
咁我唔使計都知a=a la~
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