Bună!
_______
[tex]P_{0} =100~ lei/buc.\\Qc_{0}=150~buc.\\ P_{1} =80 ~lei/buc.\\Qc_{1} =200 ~buc.\\kec_{/P}=?\\ ---------[/tex]
[tex]{\boxed{kec_{/P}=\frac{-\Delta\%Qc}{\Delta\%P} }[/tex]
[tex]\Delta\%Qc=I_{Qc} -100\%\\I_{Qc}=\frac{Qc_{1} }{Qc_{0} }*100=\frac{200}{150} *100=133,33\%\\ \Delta\%Qc=133,33\%-100\%=33,33\%\\[/tex]
[tex]\Delta\%P=I_{P}-100\%\\ I_{P}=\frac{P_{1} }{P_{0} } *100=\frac{80}{100} *100=80\%\\\Delta\%P=80\%-100\%=-20\%[/tex]
[tex]kec_{/P}=\frac{-33,33\%}{-20\%}= > {\boxed {kec_{/P}= 1,66}}[/tex]
[tex]Notatii:\\P-pret\\Qc-cantitatea~ceruta\\I_{P}-indicele pretului\\ \Delta\%P-variatia~procentuala~a~pretului\\P_{0} -pretul ~in ~perioada~initiala\\ P_{1} -pretul~in~perioada~actuala\\kec_{/P}=coeficentul~de~elasticitate~a~cererii~in~functie~de~pret[/tex]