a-b-c-30-and-a-b-c-gt-0-find-the-minimum-value-of-1-a-1-b-1-c-

Question Number 151070 by mathdanisur last updated on 18/Aug/21

a + b + c = 30 and a; b; c > 0

find the minimum value of

\frac{1}{a} + \frac{1}{b} + \frac{1}{c}

Commented by john_santu last updated on 18/Aug/21

\frac{1}{a} + \frac{1}{b} + \frac{1}{c} ⩾ \frac{{(1 + 1 + 1)}^{2}}{a + b + c} = \frac{9}{30} = \frac{3}{10}

Commented by mathdanisur last updated on 18/Aug/21

Thank you Ser

what an inequality it was please

Commented by Ari last updated on 20/Aug/21

Can you explain please how thid inequality is ?

Commented by Ari last updated on 20/Aug/21

Could you explain please how this enequality is ?

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