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<span style="font-size:10.0pt; font-family:"Comic Sans MS"" lang="EU">Banketxe jakin batek merkaturatu duen inbertsio-planaren errentagarritasuna R(x) (mila eurotan adierazia) inbertitutako x kantitatearen (mila eurotan) menpe dago funtzio honek adierazitako moduan:</span><br> <p><span style="font-size:10.0pt;font-family:"Comic Sans MS"" lang="EU"> </span></p><div class="editor-indent" style="margin-left: 30px;"> «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»R«/mi»«mo»(«/mo»«mi»x«/mi»«mo»)«/mo»«mo»=«/mo»«mo»-«/mo»«mn»0«/mn»«mo»,«/mo»«mn»001«/mn»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«mn»0«/mn»«mo»,«/mo»«mn»4«/mn»«mi»x«/mi»«mo»+«/mo»«mn»4«/mn»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«mn»10«/mn»«mo»§#8804;«/mo»«mi»x«/mi»«mo»§#8804;«/mo»«mn»400«/mn»«mo»§#160;«/mo»«mo»§#160;«/mo»«mi»b«/mi»«mi»a«/mi»«mi»d«/mi»«mi»a«/mi»«/math»<br></div><div class="editor-indent" style="margin-left: 30px;"><br></div><p style="margin-left:72.0pt;text-indent:-18.0pt; tab-stops:list 72.0pt"><span style="font-size: 10.0pt;font-family:"Comic Sans MS"" lang="EU">a.<span style="font:7.0pt "Times New Roman""> </span></span><span style="font-size:10.0pt; font-family:"Comic Sans MS"" lang="EU">Adierazi grafikoki aurreko funtzioa.</span></p> <p style="margin-left:72.0pt;text-indent:-18.0pt; tab-stops:list 72.0pt"><span style="font-size: 10.0pt;font-family:"Comic Sans MS"" lang="EU">b.<span style="font:7.0pt "Times New Roman""> </span></span><span style="font-size:10.0pt; font-family:"Comic Sans MS"" lang="EU">Aurkitu zein den errentagarritasun maximoa eta hura lortzeko inbertitu beharreko kantitatea.</span></p> <p style="margin-left:72.0pt;text-indent:-18.0pt; tab-stops:list 72.0pt"><br><span style="font-size:10.0pt; font-family:"Comic Sans MS"" lang="EU"></span></p> <span style="font-size:10.0pt;font-family:"Comic Sans MS"" lang="EU"></span><p> Errentagarri maximoa x= {:SA:=#M1} mila € euroka da.</p><p> Hau lortzeko {:SA:=#M} milla € inbertitu behar da.</p>
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