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the value of c so that all real x, the vectors cxi-6j+k,xi+2j+2c k make an obtuse angle are

the value of c so that all real x, the vectors cxi-6j+k,xi+2j+2c k make an obtuse angle are

Grade:12th pass

1 Answers

ng29
1698 Points
7 years ago
there will not be value of c it will be interval
for obtuse angle make dot product product between the vectors negative
we get  cx2 -12+2c
c 2+2)
as x belongs to real u can find out the interval of c easily
approve if useful

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