If l, m, n are the direction cosines of the line x - 1 = 2(y + 3) = 1 - z, then what is l4 + m4 + n4 equal to?

If l, m, n are the direction cosines of the line x - 1 = 2(y + 3) = 1

1.	If l, m, n are the direction cosines of the line x - 1 = 2(y + 3) = 1 - z, then what is l4 + m4 + n4 equal to?
A.	1
B.	\(\dfrac{11}{27}\)
C.	\(\dfrac{13}{27}\)
D.	4
Answer» C. \(\dfrac{13}{27}\)

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If l, m, n are the direction cosines of the line x - 1 = 2(y + 3) = 1 - z, then what is l4 + m4 + n4 equal to?

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