1.

bar(a)=hati+hatj+hatk,bar(b)=hati+3hatj+5hatk and bar( c )=7hati+9hatj+11hatk are vectors. The area of the parallelogram whose diagonals are bar(a)+bar(b) and bar(b)+bar( c ) is …………..

Answer»

`4sqrt(6)`
`(1)/(2)sqrt(21)`
`(sqrt(6))/(2)`
`sqrt(6)`

ANSWER :A


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