`tan^(-1)3 + tan^(-1) lambda = tan^(-1) {(3+ lamda)/(1- 3 lamda)}` is valid for what values of `lambda` ?
A) `lambda in (-1/3,1/3)`
B) `lambda gt (1/3)`
C) `lambda lt (1/3)`
D) all real values of `lambda`

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Find the value of lambda if the points A(-1, 4, -3) B(3, lambda , - 5), C (-3 ,8,-5) D(-3, 2, 1) are coplanar.

Find the values of lambda for which 3-lambda,-1,1-1,5-lambda,-11,-1,3-lambda]|=0

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If the points A(-1, 3, lambda), B(-2, 0, 1) and C(-4, mu, -3) are collinear, then the values of lambda and mu are