Question

find LCM for the 3-9​

Answer 1

Steps to find LCM  

Find the prime factorization of 3 3 = 3

Find the prime factorization of 9 9 = 3 × 3

Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM: LCM = 3 × 3

LCM = 9

Answer 2

lcm = 9

hence proved

hope it helps