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Message: <blockquote data-quote="pdn.ac.lk" data-source="post: 22742322" data-attributes="member: 400100"><p style="text-align: left"><span style="font-size: 18px"><p style="text-align: center">take i)</p></p> <p style="text-align: left"></span></p><p><span style="font-size: 18px"></span></p><p><span style="font-size: 18px"></span></p><p><span style="font-size: 18px">      consider the sufficient part</span></p><p><span style="font-size: 18px"></span></p><p><span style="font-size: 18px">let x=1, y=10 </span></p><p><span style="font-size: 18px">then x+y+7=18>0 but x-y+7=-2<0</span></p><p><span style="font-size: 18px">so,  the sufficent part is false</span></p><p><span style="font-size: 18px"></span></p><p><span style="font-size: 18px">     now consider the necessary part</span></p><p><span style="font-size: 18px"></span></p><p><span style="font-size: 18px">let x=-7, y=-2 </span></p><p><span style="font-size: 18px">then x-y+7=2>0 but x+y+7=-2<0</span></p><p><span style="font-size: 18px">so,  the necessary part is also false</span></p><p><span style="font-size: 18px"></span></p><p style="text-align: center"><span style="font-size: 18px">likewise, u can prove that only the converse part of ii) is true</p></span></p><p style="text-align: center"><span style="font-size: 18px"></p></span></p><p style="text-align: center"><span style="font-size: 18px">therefore, The answer is <span style="color: Red">E</span> </p><p></span></p></blockquote><p></p>

Verification: Hathara warak wissa keeyada? (Hathara wadi karanna 20)

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