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Let ** be the binary opertion on N given...

Let `**` be the binary opertion on N given by `a **b=L.C.M.` of a and b. Find
(i) `5 **7, 20 **16`
(ii) Is `**` commutative ?
(iii) Is `**` associative ?
(iv) Find the identity of `**` ?
(v) Which elements of N are invertible for the opertion `**` ?

Text Solution

Verified by Experts

The correct Answer is:
(i) `5 **7 =35,20** 16 =80 ` (ii) Yes (iii) Yes (iv) 1 (v) 1
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