MatricesHard

Question

If the lines

and

are coplanar, then k can have :

Options

A.any value

B.exactly one value

C.exactly two values

D.exactly three values

Solution

⇒
⇒
⇒      (1 + 2k) + (1 + k²) - (2 - k) = 0
⇒      k² + 3k = 0

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