Prove-by-set-theory-or-otherwise-lcm-gcd-x-y-gcd-y-z-gcd-z-x-is-equal-to-gcd-lcm-x-y-lcm-y-z-lcm-z-x-Or-give-a-counter-example-

Question Number 94955 by Rasheed.Sindhi last updated on 22/May/20

$${Prove}\:{by}\:{set}\:{theory}\:{or}\:{otherwise} \\ $$$$\:\:\mathrm{lcm}\left(\:\mathrm{gcd}\left(\mathrm{x},\mathrm{y}\right),\mathrm{gcd}\left(\mathrm{y},\mathrm{z}\right),\mathrm{gcd}\left(\mathrm{z},\mathrm{x}\right)\:\right) \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{is}\:\mathrm{equal}\:\mathrm{to} \\ $$$$\:\mathrm{gcd}\left(\:\mathrm{lcm}\left(\mathrm{x},\mathrm{y}\right),\mathrm{lcm}\left(\mathrm{y},\mathrm{z}\right),\mathrm{lcm}\left(\mathrm{z},\mathrm{x}\right)\:\right) \\ $$$$\:\:{Or}\:{give}\:{a}\:{counter}\:{example}. \\ $$

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