if a,b,c are positive real numbers such that ab2c3=64 then minimum value of 1/a +2/b +3/c=? (ans is 3) Share with your friends Share 0 Lovina Kansal answered this Dear student We have,ab2c3=64⇒ab2c3=2×2×2×2×2×2⇒ab2c3=22223On comparing, we geta=b=c=2Consider,1a+2b+3c=12+22+32=1+2+32=62=3is the required minimum value. Regards -2 View Full Answer