Check whether the following pair of statements are negation of each other. Give reasons for your answer.
i) `x+y=y+x` is true for every real numbers `x `and `y`
ii) There exists real numbers `x` and `y` for which `x+y=y+x`

Explanation

No.
The negation of the statement (i) is .There exist real.numbers .x. and .y. for which .x+y neq y+. .x. instead of (ii) .^( (nd )). statement.