Welcome,
%1$s
. Please
login
or
register
.
October 17, 2017, 08:22:06 PM
Submit
Quotes
CELL TRACKER
Online Fun Database

Puzzles

Difficulty Level  Easy

What's wrong here?
Random
Celebrities
Places
Humour
Quotes
Informative
Articles
Stories
Indian
Videos
Puzzles
Easy
Medium
Tough
On Maths and Physics
What am I?
Puzzled PJs
« previous
next »
:
1
: What's wrong here? ( 4563 )
What's wrong here?
«
:
May 17, 2007, 09:49:54 PM From
Prateek
»
What's wrong here?
"Proof" that 2 = 1:
a = b
a2 = ab
a2  b2 = abb2
(ab)(a+b) = b(ab)
a+b = b
b+b = b
2b = b
2 = 1
Does this argument make sense?
Liked It? Share it!
Tweet
Re: What's wrong here?
«
#1 :
May 20, 2007, 10:46:14 PM From Veena»
step: (a+b)(ab)=b(ab), here ab=0, division fails
Re: What's wrong here?
«
#2 :
September 02, 2007, 11:14:10 PM From
pinkk
»
wats wrong here is that
a2b2 isnt equal to (ab)(a+b)
instead
a^2 b^2 =(ab)(a+b)
Re: What's wrong here?
«
#3 :
September 03, 2007, 10:32:17 PM From
spazinvader
»
(ab)(a+b) = b(ab)
In this u cannot cancel ab because 0/0 is indeterminant form.
If we can do so then
0*5=0*2==>5=2
0*7=0*8==>7=8
So this proof is not valid
Re: What's wrong here?
«
#4 :
September 15, 2007, 01:15:53 PM From
dilip_dh_!43
»
there is mistake in
(ab)(a+b)=b(ab)
bcoz u can,t divide 0 by 0............as a=b.so ab must be zero.
Re: What's wrong here?
«
#5 :
September 26, 2007, 02:07:28 AM From
revi_2002n
»
even though this proof is wrong we can prove 1 == 2
1 == 1
as this is equality so we can do any operation on both sides...
1 = 1+0
both are equal still
now make factorial on both sides
1! = (1+0)!
1! = 1! + 0!
so as 1!=1
0!=1
LHS =1 and RHS 1+1=2
so, 1=2
is there any thing wrong here, plz specify....
Re: What's wrong here?
«
#6 :
September 26, 2007, 11:14:17 AM From
Shrinidhi
»
revi_2002n,
(a+b)! = a! + b!
?
How did you deduce that formula?
Re: What's wrong here?
«
#7 :
September 26, 2007, 10:01:22 PM From
spazinvader
»
You are right shrindhi
We can't make
(a+b)!=a!+b!
it could be
(a+b)!=a!(a+1)(a+2)....(a+b)
Re: What's wrong here?
«
#8 :
September 27, 2007, 10:12:03 AM From
vishwakarma.deepak
»
(a+b)! = a! + b!
hey revi pls take care while posting...give a thought as we all trust each other and do read everyones thought...
Njoy!
Deepak
:
1
« previous
next »
Best Rated
List All>>
Latest
Random
Loading...