Question

Let ā=-i-k, b =-i+j and =î+2j+3Â be three given vectors. If is a vector such
that r X b =č x b and r. a=0, then the value of r.b equal to ​

Answer 1

Answer:

Explanation:

Vector(r x b) = vector(c x b)

Taking cross with a ⇒ vector(a x (r x b)) = vector(a x (c x b))

⇒ vector((a x b)r - (a x r)b) = vector(a x (c x b))

⇒ vector r = - 3i + 6j + 3k

vector(r x b) = 3 + 6 = 9

Answer 2

Answer:

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Explanation: