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Fungsi penawaran suatu barang  Apabila harga berub...

Fungsi penawaran suatu barang begin mathsize 14px style Qs space equals space 100 space plus space 3 straight P. end style Apabila harga berubah dari 100 menjadi 120 maka besarnya elastisitas penawaran adalah ... space

  1. .... space

  2. .... space

Jawaban:

Penyelesaian:

begin mathsize 14px style Dik colon space Qs equals 100 plus 3 straight P space space space space space space space straight P subscript 1 equals 100 space space space space space space space straight P subscript 1 equals 120 Dit colon space straight E equals.... ? Jawab colon straight P subscript 1 equals 100 straight Q subscript 1 equals 100 plus 3 straight P subscript 1 straight Q subscript 1 equals 100 plus 3 left parenthesis 100 right parenthesis straight Q subscript 1 equals 100 plus 300 straight Q subscript 1 equals 400  straight P subscript 2 equals 120 straight Q subscript 2 equals 100 plus 3 straight Q subscript 2 straight Q subscript 2 equals 100 plus 3 left parenthesis 120 right parenthesis straight Q subscript 2 equals 100 plus 360 straight Q subscript 2 equals 460  straight E equals fraction numerator increment straight Q over denominator increment straight P end fraction cross times straight P subscript 1 over straight Q subscript 1 straight E equals fraction numerator straight Q subscript 2 minus straight Q subscript 1 over denominator straight P subscript 2 minus straight P subscript 1 end fraction cross times straight P subscript 1 over straight Q subscript 1 straight E equals fraction numerator 460 minus 400 over denominator begin display style 120 minus 100 end style end fraction cross times 100 over 400 straight E equals fraction numerator 60 over denominator begin display style 20 end style end fraction cross times 100 over 400 straight E equals 0 comma 75 end style


Dengan demikian, besar elastisitas penawarannya adalah sebesar 0,75. space 

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