Q4 of 227 Page 90

Find the LCM of the following

66a4b2c3, 44a3b4c2, 24a2b3c4

Given terms: –


66a4b2c3, 44a3b4c2, 24a2b3c4


Formula used: –


LCM = Least Common Multiple


Means it is the lowest term by which every element must be


divided completely;


66a4b2c3 = 3 × 2 × 11 × a × a × a × a × b × b × c × c × c


44a3b4c2 = 2 × 2 × 11 × a × a × a × b × b × b × b × c × c


24a2b3c4 = 2 × 2 × 2 × 3 × a × a × b × b × b × c × c × c × c


first find the common factors in all terms


Common factor in all terms = 2 × a × a × b × b × c × c


Common factors from any 2 terms


2a2b2c2 × [(3 × 11 × a × a × c)( 2 × 11 × a × b × b)( 2 × 2 × 3 × b × c × c)]


2a2b2c2 × (3 × 11 × 2 × a × b × c)[(a)(b)(2c)]


then multiply the remaining factors of terms in common


factor to get the LCM


= 2a2b2c2 × (66abc) × (2abc)


(66 × 2 × 2)( a2b2c2 × abc × abc )


264 a4b4c4


Conclusion: –


The LCM of given terms [66a4b2c3, 44a3b4c2, 24a2b3c4] is 264 a4b4c4


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