answer the above question pls don't spam
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sorry
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I really dont know this question...
SORRY ONCE AGAIN....
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given that..
a=p,b=q,c=r.
a(q-r)+b(r-p)+c(p-q)=0
p(q-r)+q(r-p)+r(p-q)=0
pq-pr+qr-qp+rp-rq=0
0=0
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