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If bar(a), bar(b)&bar(c) are non-coplanar vectors and if bar(d) is such that bar(d)=1/x(bar(a)+bar(b)+bar(c)) and bar(d)=1/y(bar(b)+bar(c)+bar(d)) where x and y are non-zero real numbers, then 1/(xy)(bar(a)+bar(b)+bar(c)+bar(d))= |
| Answer» Answer :C | |