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Question : 32 of 160
Marks:
+1,
-0
Solution:
It is given that,
a=pi+pj+pk b=i+j−2k c=2i−j+2k Therefore
[a‌b‌c]‌‌=|| ‌‌=p(2−2)−p(2+4)+p(−1−2) ‌‌=−9p Now −5≤−9p≤15 ‌≥p≥−‌ Hence,
p∈[−‌,‌]
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