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If a*b=2a+3b for all a and b, then what is the value of 4*3$

 Sep 24, 2019
 #1
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I see... the * isn't multiplication....

 

It would have been far clearer if you had either stated that up front or used a different symbol.

 Sep 24, 2019
edited by Rom  Sep 24, 2019
 #2
avatar+23850 
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If a*b=2a+3b for all a and b, then what is the value of 4*3

 

\(\begin{array}{|rcll|} \hline 4*3 &=& 2\cdot 4 + 3\cdot 3 \\ &=& 8+9 \\ &=& \mathbf{17} \\ \hline \end{array}\)

 

laugh

 Sep 24, 2019

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