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let bar(a),bar(b)&bar(c) be three non-ze...

let `bar(a),bar(b)&bar(c)` be three non-zero non coplanar vectors and `bar(p),bar(q)&bar(r)` be three vectors defined as `bar(p)=bar(a)+bar(b)-2bar(c);bar(q)=3bar(a)-2bar(b)+bar(c)&bar(r)=bar(a)-4bar(b)+2bar(c)` .If `v_(1),v_(2)` are the volumes of parallelopiped determined by the vectors `bar(a),bar(b),bar(c)` and `bar(p),bar(q),bar(r)` respectively then `v_(2):v_(1)` is

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