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The sum to n terms of the series 11+12+14+21+22+24+31+32+34+…… is 12−1a(nb+nc+dn4+1), then a+b+c+d= |
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Answer» The sum to n terms of the series 11+12+14+21+22+24+31+32+34+…… is 12−1a(nb+nc+dn4+1), then a+b+c+d= |
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