Let l and $l ^ { \prime }$ be two lines in space given by the equations
x = 3 + t
x = -1 + t
l:
y = 1 - t $l ^ { \prime }$ :
y = 2t
z = 2t
z = 1 + kt
Find all values of k (if any) for which l and $l ^ { \prime }$ are parallel.

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The Answer of Let l and $l ^ { \prime }$ be two lines in space given by the equations
x = 3 + t
x = -1 + t
l:
y = 1 - t $l ^ { \prime }$ :
y = 2t
z = 2t
z = 1 + kt
Find all values of k (if any) for which l and $l ^ { \prime }$ are parallel.

Let L And l′l ^ { \prime }l′ Be Two Lines in Space Given by the Equations X

Let L And $l ^ { \prime }$ Be Two Lines in Space Given by the Equations
X