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Let c(a,b,c)=ab+bc+ca. Compute c(2,12,9).

 Jul 6, 2018
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c(a,b,c)=ab+bc+ca;c(2,12,9)=212+129+92 This shows the relationship of the input to the problem at hand. It is now necessary to convert all fractions to common denominators so that we can simplify the right-hand side. The LCM, in this case, is 36. 
c(a,b,c)=636+4836+16236  
c(a,b,c)=21636=6 That's quite a nice result, don't you think?
   
 Jul 7, 2018

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