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"Let "plambda^(4) + qlambda^(3) +rlambda...

`"Let "plambda^(4) + qlambda^(3) +rlambda^(2) + slambda +t =|{:(lambda^(2)+3lambda,lambda-1, lambda+3),(lambda+1, -2lambda, lambda-4),(lambda-3, lambda+4, 3lambda):}|` be an identity in `lambda`,
where p,q,r,s and t are constants. Then, the value of t is..... .

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