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</ul> </div> </div> </div> <div id="c8csqaf" class="crumbs g-cw"> <i 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="wccipgw" class="m-wrap g-cw cfx"> <div id="bxbhgrw" class="w fl"> <div id="in5uvmu" class="g-mn2"> <ul id="J_question_detail" > <li> <div id="pnye7ox" class="question-block"> <div id="vfrj0ct" class="q-mc"> <h1 class="q-tit"> 1. <a href="/paper/view-3552539.shtml" class="ques-origin a-pointer" target="_blank"> (2020九上·江津月考) </a> 已知拋物線y＝﹣x<sup>2</sup>+（k﹣1）x+3，當(dāng)x＞2時(shí)，y隨x的增大而減小，并且關(guān)于x的分式方程 <img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfrac%3E%3Cmrow%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmo%3E%2B%3C%2Fmo%3E%3Cmi%3Ek%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfrac%3E%3Cmo%3E%2B%3C%2Fmo%3E%3Cmfrac%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmi%3Ek%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3Cmi%3Ex%3C%2Fmi%3E%3C%2Fmrow%3E%3C%2Fmfrac%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> 的解為正數(shù).則符合條件的所有正整數(shù)k的和為（　　） </h1> <div id="uiszgpm" class="exam-s"> <span id="7qh1fas" class="op-item"><span id="r3zhy0c" class="op-item-nut">A . </span><span id="nzmda3u" class="op-item-meat">8</span></span> <span id="urcbc8c" class="op-item"><span id="0prqrix" class="op-item-nut">B . </span><span id="wt7yyjr" 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