<p>本人在看Pindyck, Rubinfeld的微观经济学第三版,第三章练习第7题中关于求证天然气和油的问题,问什么能分别设需求函数为<span style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">Q</span>
<span style="FONT-SIZE: 10pt; VERTICAL-ALIGN: sub; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; POSITION: relative; TOP: 2pt; mso-spacerun: 'yes'; mso-text-raise: -2.0000pt;">G</span>
<span style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">&nbsp;=&nbsp;a&nbsp;</span>
<span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">-</span>
<span style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">&nbsp;bP</span>
<span style="FONT-SIZE: 10pt; VERTICAL-ALIGN: sub; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; POSITION: relative; TOP: 2pt; mso-spacerun: 'yes'; mso-text-raise: -2.0000pt;">G</span>
<span style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">&nbsp;+&nbsp;eP</span>
<span style="FONT-SIZE: 10pt; VERTICAL-ALIGN: sub; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; POSITION: relative; TOP: 2pt; mso-spacerun: 'yes'; mso-text-raise: -2.0000pt;">O</span>&nbsp;<span style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">&nbsp;</span> ,</p><p>供给函数为<span style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">Q</span>
<span style="FONT-SIZE: 10pt; VERTICAL-ALIGN: sub; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; POSITION: relative; TOP: 2pt; mso-spacerun: 'yes'; mso-text-raise: -2.0000pt;">G</span>
<span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">&nbsp;=</span>
<span style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">&nbsp;c&nbsp;+&nbsp;dP</span>
<span style="FONT-SIZE: 10pt; VERTICAL-ALIGN: sub; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; POSITION: relative; TOP: 2pt; mso-spacerun: 'yes'; mso-text-raise: -2.0000pt;">G</span>
<span style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; mso-spacerun: 'yes';">&nbsp;+&nbsp;gP</span>
<span style="FONT-SIZE: 10pt; VERTICAL-ALIGN: sub; FONT-STYLE: italic; FONT-FAMILY: 'Century Schoolbook'; LETTER-SPACING: -0.1pt; POSITION: relative; TOP: 2pt; mso-spacerun: 'yes'; mso-text-raise: -2.0000pt;">O</span> (O和G分别代表OIL和GAS)<font size="2">?这个题目比较初级,见笑了,希望各位高人能给予解答。</font></p><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment-->


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