1.

If 13 vec(a)= 3vec(i) + 4vec(j)+ 12vec(k), 13vec(b)= 4vec(i)-12vec(j) + 3vec(k), 13vec(c )=12vec(i) + 3vec(j)-4vec(k), then vec(a) xx vec(b)=

Answer»

`VEC(C )`
`5 vec(c )`
`13 vec(c )`
`169 vec(c )`

ANSWER :A


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