If P and Q be two given points on the curve y=x+1x such that OP¯i^=1 and OQ¯⋅i^=−1 where i^ is a unit vector along the x -axis, If the length of vector 2OP→+3OQ→ is k , then k is
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
answer is 5.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
Let Px1,y1,Qx2,y2 be two points on the curve y=x+1x . Let i^ be unit vector along x -axis and Let j be a unit vector along y -axis. Then OP¯=x1i^+y1j^,OQ¯=x2i^+y2j^ Since, OP→⋅i^=1 and OQ→i^=−1∴x1=1 and x2=−1⇒y1=2 and y2=−2∴OP→=i^+2j^;OQ=−i^−2j^∴2OP→+3OQ→=2i+4j−3i−6j=−i−2j Hence, |2OP→+3OQ→|=1+4=5=k⇒k=5
If P and Q be two given points on the curve y=x+1x such that OP¯i^=1 and OQ¯⋅i^=−1 where i^ is a unit vector along the x -axis, If the length of vector 2OP→+3OQ→ is k , then k is