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What is the following expression, lcm (a, lcm (b, c) equal to?

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What is the following expression, lcm (a, lcm (b, c) equal to?

(a) lcm (a, b, c)

(b) a*b*c

(c) a + b + c

(d) lcm (lcm (a, b), c)

I have been asked this question during an interview for a job.

My query is from GCD LCM recursion in section Recursion of Data Structures & Algorithms II

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The correct answer is (d) lcm (lcm (a, b), c)

For explanation: Since LCM function follows associativity, hence lcm (a, lcm (b, c) is equal to lcm (lcm (a, b), c).

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