[" 3.If "vec a=(2i-4)^(n)+5hat k" ) then find the value of "b" so that "lambda" a may be a unis? "],[" vextor."]

If vec a=(2hat i-4hat j+5hat k) then find the value of lambda so that lambdavec a may be a unit vector.

If vec a= hat i-\ hat j+7 hat k and vec b=5 hat i-\ hat j+lambda hat k , then find the value of lambda, so that vec a+ vec b and vec a- vec b are perpendicular vectors.

If vec(a) = hat(i) - hat(j) + 7hat(k) and vec(b) = 5hat(i) - hat(j) + lambda hat(k) , then find the value of lambda so that vec(a) + vec(b) and vec(a) - vec(b) are perpendicular vectors.

If vec a=widehat a=hat i-hat j+7hat k and vec b=5hat j-hat j+lambdahat k, then find the value of lambda so that vec a+vec b and vec a-vec b are perpendicular vectors.

If vec p=5 hat i+lambda hat j-3 hat k and vec q= hat i+3 hat j-5 hat k , then find the value of lambda , so that vec p+ vec q and vec p- vec q are perpendicular vectors.

If vec(A)=4hat(i)+nhat(j)-2hat(k) and vec(B)=2hat(i)+3hat(j)+hat(k) , then find the value of n so that vec(A) bot vec(B)

If vec(A)=4hat(i)+nhat(j)-2hat(k) and vec(B)=2hat(i)+3hat(j)+hat(k) , then find the value of n so that vec(A) bot vec(B)

If vec(A)=4hat(i)+nhat(j)-2hat(k) and vec(B)=2hat(i)+3hat(j)+hat(k) , then find the value of n so that vec(A) bot vec(B)

If vec (a) = 3 hat (i) + 2 hat (j) + 9 hat (k) and vec(b) = hat (i) + lambda hat (j) + 3 hat (k) , then find the value of lambda so that the vectors (vec(a) + vec(b)) and (vec(a) - vec(b)) are perpendicular to each other .