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If a*b=LCM of (a,b) then 4*6...

If a*b=LCM of (a,b) then 4*6

A

24

B

12

C

8

D

6

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The correct Answer is:
B
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Let ** be binary operation on N given by a ** b = LCM of a and b. Find Is ** commutative

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Let '*' be a binary operation on N given by a* b = LCM (a,b) for all a , b in N . Find 5 * 7.

Is '*' defined on the set {1, 2, 3, 4, 5} by : a * b = L.C.M. . of a and b, a binary operation ? Justify your answer.

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Is '*' defined on the set {1,2,3,4,5} by a*b = L.C.M. of a and b a binary operation ? Justif your answer.

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Let ∗ be the binary operation on N given by * a * b = L.C.M. of a and b . Find : Which elements of N are invertible for the operation ∗ ?

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  6. I.F. Of the differential equation dy/dx+2y=e^(2x) is :

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