1 - 1 + 1 - 2 + 1 - 3 + ... up to n terms = ? n n n

• A. <table class="ga-tbl-answer" cellpadding="0" cellspacing="0"> <tbody><tr class="ga-tr-divident" align="center"> <td class="ga-td-divident">1</td> <td class="ga-td-line" rowspan="2"><i class="ga-var">n</i></td> </tr> <tr class="ga-tr-divisort" align="center"> <td class="ga-td-divisor">2</td> </tr> </tbody></table>
• B. <table class="ga-tbl-answer" cellpadding="0" cellspacing="0"> <tbody><tr class="ga-tr-divident" align="center"> <td class="ga-td-divident">1</td> <td class="ga-td-line" rowspan="2">(<i class="ga-var">n</i> - 1)</td> </tr> <tr class="ga-tr-divisort" align="center"> <td class="ga-td-divisor">2</td> </tr> </tbody></table>
• C. <table class="ga-tbl-answer" cellpadding="0" cellspacing="0"> <tbody><tr class="ga-tr-divident" align="center"> <td class="ga-td-divident">1</td> <td class="ga-td-line" rowspan="2"><i class="ga-var">n</i>(<i class="ga-var">n</i> - 1)</td> </tr> <tr class="ga-tr-divisort" align="center"> <td class="ga-td-divisor">2</td> </tr> </tbody></table>
• D. None of these