how to find LCM of value given ...or solve numerical problem s 1/v-1/10-1/-30 in mirror formula .What's the method of finding LCM in this case
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(1/v)-(1/10)-(1/30)
=1/v-1/10-1/30
LCM is 30v
=30/30v-3v/30v-v/30v
=30-3v-v/30v
=30-4v/30v
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