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GCD & LCMmedium
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If GCD(a,b)=7\text{GCD}(a, b) = 7GCD(a,b)=7 and a,b>0a, b > 0a,b>0, which of the following is true regarding GCD(3a,3b)\text{GCD}(3a, 3b)GCD(3a,3b)?