If the vectors `veca=hati-hatj+2hatk.vecb=2hati+4hatj+hatk and veccc=lambdahati+hatj+muhatk` are mutually orthogonal, then `(lambda, mu)`

If the vectors veca=hati-hatj+2hatk.vecb=2hati+4hatj+hatk and vec c=lambdahati+hatj+muhatk are mutually orthogonal, then (lambda, mu)

If the vectors veca = hati-hatj+2hatk, vecb=2hati+4hatj+hatk and vecc=lambda hati+hatj+mu hatk are mutually orthogonal, then (lambda, mu)=

If the vectors veca=hati-hatj+2hatk, vecb=2hati+4hatj+hatk and vecc=lamda hati+hatj+muhatk are mutually orthogonal then (lamda, mu)= (A) (-2,3) (B) (3,-2) (C) (-3,2) (D) (2,-3)

If the vectors veca = hati - hatj + 2 hatk, vecb = 2 hati + 4 hatj + hatk and vecc = lamda hati + hatj + mu hatk aer mutually orthogonal, then (lamda, mu)=

Find the sum of the vectors veca=hati-2hatj+hatk,vecb=-2hati+4hatj+5hatkandvecc=hati-6hatj-7hatk .