1.

If the point whose position vectors are 2hati+hatj+hatk,6hati-hatj+2hatk and 12hati-5hatj+phatk are collinear, then the value of p is

Answer»

2
4
6
8

Solution :Given VECTORS are collinear, if `|(2,1,1),(6,-1,2),(14,-5,p)|=0`
`implies 2[-p+10]-1[6p-28]+1[-30+14]=0`
`implies -8p+32=0 implies p=4`


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