If real numbers a,b, c satisfy a+b+c=0 , abc=4 , which one best describes the value of
\dfrac{1}{a} +\dfrac{1}{b} +\dfrac{1}{c}
-
×
Positive numbers
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×
Zero
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✓
Negative numbers
-
×
Positive or negative numbers
Steven Zheng
posted 6 months ago