prove 1=2,if a=b;?

Question

try hard .i bet you can't get it.

Answer 1

a=b
ab=b^2
ab-a^2=b^2-a^2
a(b-a)=(b+a)(b-a)
a=b+a
a=a+a
a=2a
1=2

Answer 2

if 1=a and 2=b

Answer 3

MDMMD is correct... however, note that this is a standard proof for showing how a proof can be incorrect although correct statements have been made. That whole 1=2 proof is just a mathematical trick. I believe he/she ends with a=2a. MDMMD made the conclusion that we divide by a... not true. You subtract a to solve this. Therefore, the next step is that 0=a. Mathematically, MDMMD did nothing wrong... but he/she did show why this one proof although correct in technique... fails in execution.

In short, MDMMD has the correct answer you are looking for. However, please note that this is a standard trick and therefore 1 does not really equal 2.

Answer 4

because 1 is a and b is 2?

Answer 5

log 1= 0
log2 = log 1 +1= log1+log1= 0+0= 0
therefore log 1 =log2
1=2

Answer 6

it just like an a=1 b=2 conversation

Answer 7

I could, and have, created a formula to prove that 1=2, but ultimately we all know one can not really equal two, and I am completely willing to refute any argument you may concoct to stay your position because I'm pretty sure i know where your going with this.

Answer 8

I know this is kind'a cheating.

a = 2 nickels
b = 1 dime

Or we can always use the 0/0 error to do it like everyone else
a = b
a^2 = ab
a^2 + a^2 = a^2 + ab
2a^2 = a^2+ab
2a^2 - 2ab = a^2 + ab - 2ab
2a^2 - 2ab = a^2 - ab
2(a^2 - ab) = a^2 - ab
2(a^2 - ab)/(a^2 - ab) = (a^2 - ab)/(a^2 - ab)
2 = 1

Answer 9

Impossible. Why even bother worying about this nonsense. Do some Geometry proofs.

Thanks,
Buster

Answer 10

It's impossible.

http://www.math.toronto.edu/mathnet/falseProofs/first1eq2.html

Answer 11

let a=1
let b=2
therefore if a=b, then 1=2
its a question in prepositional logic, not mathematics
(philosophy 101)