ajouter ce texte en feedback général[br][br]$${a}×{b}^x={c}$$[br]$$log({b}^x) = log(\frac{{c}}{{a}})$$[br]$$log({b}^x)= {=round( log({c}/{a}) , 3)}$$[br]$$x×log({b}) = {=round( log({c}/{a}) , 3)}$$[br]$$x×{=round( log({b}) ,3 )} = {=round( log({c}/{a}) , 3)}$$[br]$$x = \frac { {=round( log({c}/{a}) , 3)} }  { {=round( log({b}) ,3 )} }$$[br]$$x =  {=round( (round( log({c}/{a}) , 3)) / (round( log({b}) ,3 )) , 3) }$$