Q

# let star be the binary operation on n given by a star b equal to lcm of a and b find v which elements of n are invertible for the operation star

Question 6. Let ∗ be the binary operation on N given by a ∗ b = L.C.M. of a and b. Find

(v) Which elements of N are invertible for the operation ∗?

Views

test> <sc

test

An element a is invertible in N

if $a*b=e=b*a$

Here a is inverse of b.

a*b=1=b*a

a*b=L.C.M. od a and b

a=b=1

So 1 is the only invertible element of N

Exams
Articles
Questions