Question

Let $λ∈Z ,→a=λ\^i+\^j =/^ k λ ∈$ and $\overrightarrow{ b} = 3 \^i− \^j + 2 \^k$ . be a vector such that ( $\overrightarrow{ a}+\overrightarrow{ b}+\overrightarrow{ c}$ ) × $\overrightarrow{ c}=\overrightarrow{ 0},\overrightarrow{ a}.\overrightarrow{ c}$ and $\overrightarrow{ b}.\overrightarrow{ C}=-20$ Then $| \overrightarrow{c} + ( λ \^i + \^j + \^k ) | ^2$ is equal to

• A. 46
• B. 49
• C. 53
• D. 62

Answer 1

Answer: (A)

46

Answer 2

The correct option is(A): 46