Question

The distance between origin to the point( 2 , k )is 4 .find value of k .

Answer 1

Step-by-step explanation:

$d = \sqrt{ {x }^{2} } + {y}^{2}$

$d = \sqrt{ {2}^{2} } + {k}^{2}$

$d = \sqrt{4 + {k}^{2} }$

$4 = 2 + k$

$k = 4 - 2$

$k = 2$

This is the right answer.

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