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# mathematicians look here - if possible correct me please with detailed explanations

Discussion in 'Jukwaa la Elimu (Education Forum)' started by MAHENDEKA, Sep 25, 2010.

1. ### MAHENDEKAJF-Expert Member

#1
Sep 25, 2010
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p { margin-bottom: 0.08in; }

1+1=1
Proof
Let a= 1.(i)
Multiply by a in both sides
a×a = 1×a..(ii)
From eqn (ii) reduce 1 in both sides
a²-1 = a-1(iii)
But a²-1 = (a+1)(a-1) -This is factorization of quadratic equation
There fore
(a +1)(a-1) = (a-1).(iv)
Divide by (a-1) both sides
(a+1)(a-1) = (a-1)
(a-1) (a-1)
(a+1) = 1..(v)
But from equation number (i) we let a=1.Take it and substitute into equation number (v)
Hence
1 +1 = 1

2. ### MtazamajiJF-Expert Member

#2
Sep 25, 2010
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Peleka huu uzi kwenye education

3. ### SMUJF-Expert Member

#3
Sep 25, 2010
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I dont see an 'a' in the formula you are trying to prove. Labda ungesema, let 1= a (In which case you would be asuming that we dont know what '1' is but we know what an 'a' is!).

4. ### MsaniiJF-Expert Member

#4
Sep 25, 2010
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Aaaaaargh! maluweluwe.
But MAHENDEKA nimeipenda hiyo trick yako na formula

5. ### BigiritaJF-Expert Member

#5
Sep 25, 2010
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Hanna Kitu hapo! Hesabu za kienyeji.

6. ### PretaJF-Expert Member

#6
Sep 25, 2010
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sijui ni hiki kileo....mbona nahisi kizunguzungu

7. ### MsaniiJF-Expert Member

#7
Sep 25, 2010
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mzee wa kutegua mabomu umestukia tunapelekwa chaka eeeh
kula senki hapo chini
The Following User Says Thank You to SMU For This Useful Post:

Msanii (Today) ​

8. ### cptJF-Expert Member

#8
Sep 26, 2010
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You let a=1,so wen u divide by (a-1),means dat you divide by zero both sides,mathematicaly dis is incorrect and the answer is undefined and not 1 as u show us!

9. ### DMussaJF-Expert Member

#9
Oct 3, 2010
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hili ndo tatizo la kudhania hesabu inaendeshwa kwa assumptions....

If you are trying to prove 1+1=1 why are you assuming 1 = a? kwani ukifanya ivo tayari equation yako inakuwa a+a=a so what the hell!?

10. ### KitukoJF-Expert Member

#10
Oct 3, 2010
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ulichofanya wala sio hesabu, ni kubadilisha 1kuwa 'a' na baadae kuibadilisha 'a' kuwa 1

11. ### Ng'wanangwaJF-Expert Member

#11
Oct 3, 2010
Joined: Aug 28, 2010
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BIG NO!!!

The answer Must be true for all numbers

Why?

If I let a=2, sipati 1+1=1

Kwa hiyo kwa maoni yangu hesabu yako ni sawa na maji+maji = ?

12. ### Ng'wanangwaJF-Expert Member

#12
Oct 3, 2010
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Fantastic

13. M

### MatareseJF-Expert Member

#13
Oct 3, 2010
Joined: Aug 30, 2009
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Big up Mahendeka, good thinking!
But there are several problems with ur so called proof.
1. Basically what you are doing is NOT proving but verifying that 1+1=1. There are no any analytical tools (theorems, lemmas or conjectures) that support what you are doing!

2. A proof as one of the readers put it must be true for all values ( and not necessarily numbers!) not just for some values. Your arguments are untrue when a<0.

3. The statement let a=1, is equivalent to writing a-1=0, so division by itself meand you are dividing by 0 which is indeterminate form, unless you would have put for a not equal to 1, but which contradicts your assunption that a=1!

However this is good thinking, and that is what maths needs!

14. m

### mwita ke mwitaJF-Expert Member

#14
Oct 3, 2010
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mzee asumption ziko kwenye physics

15. ### E=mcsquaredJF-Expert Member

#15
Oct 4, 2010
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Huu utoto awapelekee darasa la saba, very poor reasoning. Kwani wewe hujui kuwa 1x0= 2x0=3x0=4x0......... etc?

16. ### KivumahJF-Expert Member

#16
Oct 4, 2010
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....the way i see the problem is the Problem itself. Mathematics is the Study of Numbers only, not letters

17. ### introvertJF-Expert Member

#17
Oct 4, 2010
Joined: Sep 21, 2010
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Mmh.. Ivi unatakiwa u-prove definition au theory?! Au hiyo ni Boolean..

18. ### PapeJF-Expert Member

#18
Oct 4, 2010
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lol, very wrong idea...you were you saying 1+1=1?, why did you assume that a= 1? why you didnt assume that 1=a?

19. k

### kasyabone tallJF-Expert Member

#19
Oct 6, 2010
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Mtihani mwema kaka, Kwa mfumo huu huwezi kwepa F ya Hisabati. Tutaonana Kantalamba HKL

20. J

### JafarJF-Expert Member

#20
Oct 7, 2010
Joined: Nov 3, 2006
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