1+1=1???? How is this possible?

Question

Hey can anyone tell me how 1+1 can = 1???

Answer 1

yes but there a error here
let x=1 , y=1 so
x = y ;

x * x = x * y ; ( multiplying both sides by x )

x * x - (y * y) = x * y - (y * y) ;
(subtracting both sides by y * y)

(x - y) ( x+ y) = y ( x - y); (factorising )

x + y = y ; (cancelling ( x -y ) on both sides )

1 + 1 = 1 !!!! ;


However there a CATCH here

Answer 2

1+1 - 1 = 1 ?

Answer 3

1+1/0 =1

Answer 4

1 + 1 = 1 means
1 = 0. Possible? Not in our decimal or base 10 number system.

For example,
1 + 1 = 10 in base 2. From base 3 onwards, we have 1+1 = 2.

Unless of course "1 + 1" is NOT necessarily taken to "mean" the "usual addition".

We can use the "theory of operators" in mathematics and "define" "1 + 1 = 1".
Operator theory is interesting because "you can define" things. For example, take "+" to mean "arithmetic multiply" in a "space defined on (+)" and we get "1 + 1" actually is " 1 x 1" and thus equals to "1".

In taking "+" to mean "marriage for first child". 1 Husband and 1 wife yields "1 first child". 1 + 1 = 1 here by definition.

In the mathematical sense its impossible.

Hope this helped.

:)

Answer 5

1+1=1 couple

Answer 6

When someone loves another...2 become 1...thus 1+1=1

Answer 7

in algebra exist case about it (1+1=0 but I don't remember 1+1=1)
if you study math at the university ,you can have an answer

Answer 8

In Boolean Algebra 1 + 1 = 1
It's read 1 or 1 is 1

Answer 9

there is a flaw in the derivation above, 1+ 1 = 2

Answer 10

Don't ask anybody. 1 + 1 = 1 is impossible. Don't get duped.