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class="iconw-fixed"></i> <span>當(dāng)前位置：</span>   <a href="/question?tree_type=category&xd=2&chid=3" class="pointer">初中數(shù)學(xué)</a> <span>/</span> <a href="javascript:;">單選題</a> </div> <div id="mmyuqco" class="m-wrap g-cw cfx"> <div id="g02o4qm" class="w fl"> <div id="g4w4u0i" class="g-mn2"> <ul id="J_question_detail" > <li> <div id="mceya20" class="question-block"> <div id="qsoi4we" class="q-mc"> <h1 class="q-tit"> 1. <a href="/paper/view-2285215.shtml" class="ques-origin a-pointer" target="_blank"> (2019九上·大田期中) </a> 某農(nóng)產(chǎn)品市場經(jīng)銷一種銷售成本為40元的水產(chǎn)品．據(jù)市場分析，若按每千克50元銷售，一個(gè)月能售出500千克；銷售單價(jià)每漲一元，月銷售量就減少10千克．設(shè)銷售單價(jià)為每千克<i>x</i>元，月銷售利潤為<i>y</i>元，則<i>y</i>與<i>x</i>的函數(shù)關(guān)系式為（　?。? </h1> <div id="aqmcqqg" class="exam-s"> <span id="2a20cem" class="op-item"><span id="uo8g6ie" class="op-item-nut">A . </span><span id="wakqsok" class="op-item-meat"><i>y</i>＝（<i>x</i>﹣40）（500﹣10<i>x</i>）</span></span> <span id="owm4ic2" class="op-item"><span id="wiuai0e" class="op-item-nut">B . </span><span id="eqo0iuq" class="op-item-meat"><i>y</i>＝（<i>x</i>﹣40）（10<i>x</i>﹣500）</span></span> <span id="o0gkaak" class="op-item"><span id="sqcq4ie" class="op-item-nut">C . </span><span id="8eauy0s" class="op-item-meat"><i>y</i>＝（<i>x</i>﹣40）[500﹣10（<i>x</i>﹣50）]</span></span> <span id="sqeew8s" class="op-item"><span id="4oqwwwy" class="op-item-nut">D . </span><span id="moei8i4" class="op-item-meat"><i>y</i>＝（<i>x</i>﹣40）[500﹣10（50﹣<i>x</i>）]</span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="cqs0ww2" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="4o2ukys" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=14728731" width="140px" height="140px" alt=""> <p style="text-align:center;margin-top: 10px">微信掃碼預(yù)覽、分享更方便</p> </div> <div id="cqsgyuq" class="analyize-extend JV_question__papers"> <h3 class="extend-mt">使用過本題的試卷</h3> <ul class="extend-mc"> <li> <a href="/paper/view-5205963.shtml" target="_blank" title="專題1.1二次函數(shù)【八大題型】2023~2024學(xué)年九年級(jí)數(shù)學(xué)上冊(cè)第1章二次函數(shù)（浙教版）" class="ex-tit"> <b></b><span>專題1.1二次函數(shù)【八大題型】2023~2024學(xué)年九年級(jí)數(shù)學(xué)上冊(cè)第1章二次函數(shù)（浙教版）</span> </a> </li> <li> <a href="/paper/view-5190426.shtml" target="_blank" title="2023年浙教版數(shù)學(xué)九年級(jí)上冊(cè)1.1 二次函數(shù) 同步測試（培優(yōu)版）" class="ex-tit"> <b></b><span>2023年浙教版數(shù)學(xué)九年級(jí)上冊(cè)1.1 二次函數(shù) 同步測試（培優(yōu)版）</span> </a> </li> <li> <a href="/paper/view-5053317.shtml" target="_blank" title="河北省保定市定州市2021-2022學(xué)年九年級(jí)上學(xué)期數(shù)學(xué)期中試卷" class="ex-tit"> <b></b><span>河北省保定市定州市2021-2022學(xué)年九年級(jí)上學(xué)期數(shù)學(xué)期中試卷</span> </a> </li> <li> <a href="/paper/view-3906829.shtml" target="_blank" title="初中數(shù)學(xué)蘇科版九年級(jí)下冊(cè) 5.1 二次函數(shù) 同步訓(xùn)練" class="ex-tit"> <b></b><span>初中數(shù)學(xué)蘇科版九年級(jí)下冊(cè) 5.1 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