Question
A unit vector along the direction $\hat{\text{i}}+\hat{\text{j}}+\hat{\text{k}}$ has a magnitude:
-
$\sqrt{3}$
-
$\sqrt{2}$
-
$1$
-
$0$
$\sqrt{3}$
$\sqrt{2}$
$1$
$0$
Solution:
A unit vector along any direction always has magnitude.
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$x + ky = 1$ ; $kx + y = 2$; $x + y = k$ are consistent then $k_1^2 + k_2^2$ is equal to