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The operation $*$ is defined for non-zero integers as follows: $a * b = \frac{1}{a} + \frac{1}{b}$. If $a+b = 9$ and $ a \times b = 20$, what is the value of $a*b$? Express your answer as a common fraction.

Lightning  Jul 6, 2018
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Your question is unreadable, you can't expect others to help you...

Guest Jul 6, 2018
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The operation $*$ is defined for non-zero integers as follows: $a * b = \frac{1}{a} + \frac{1}{b}$.

If $a+b = 9$ and $ a \times b = 20$,

what is the value of $a*b$?

Express your answer as a common fraction.

 

 

answer see: https://web2.0calc.com/questions/help_48039

 

laugh

heureka  Jul 9, 2018

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