1.

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=

Answer»

The sum to n terms of the series 11+12+14+21+22+24+31+32+34+ is 121a(nb+nc+dn4+1), then a+b+c+d=



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