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in Algebra by (53.5k points)
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If x, y, z are three positive numbers, then (x + y + z) \(\left(\frac1x+\frac 1y+\frac1z\right)\) > _____.

a. 3

b. 9

c. 1/3

d. none of these

1 Answer

+1 vote
by (53.3k points)
selected by
 
Best answer

Correct option is b. 9

(or apply A ≥  H for x, y, z to get the result)

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