LET SET A (1,2,3,4,5) & B(1,2,3) THEN

a) NUMBER OF ONE ONE FUNCTIONS FROM A TO B

b) NUMBER OF ONE ONE FUNCTIONS FROM A TO A SUCH THAT F(i) ≠ i, i BELONGS TO ELEMENTS OF A

PLZ REPLY

Dear student,

One-one function

There is one-one correspondence between the elements of the set A and the set B.

Many-one function

There is many-one correspondence between the elements of the set A and the set B.

Onto function

Every element of the set B has at least one pre-image.

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