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If a and b are relatively prime, what is their LCM?

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If a and b are relatively prime, what is their LCM?
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If two numbers are relatively prime then their greatest common factor will be 1. 

∴ HCF (a,b) = 1 

Using the formula, Product of two numbers = HCF × LCM 

we conclude that, a × b = 1 × LCM 

∴ LCM = ab 

Thus, LCM (a,b) is ab.

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