IF a^x=b,b^y=c,c^z=a,x=logb a^(k1),y=log...

IF `a^x=b,b^y=c,c^z=a,x=log_b a^(k1),y=log_c b^(k2),z=log_a c^(k3)`, find the minimum value of `3k_1+6k_2+12k_3`.

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