Introduction to 3DHard
Question
Indicate the correct order statements -
Options
A.The lines 
and 
are orthogonal
and are orthogonalB.The planes 3x - 2y - 4z = 3 and the plane x - y - z = 3 are orthogonal.
C.The function f(x) = ln (e-2 + ex) is monotonic increasing ∀ x ∈ R.
D.If g is the inverse of the function, f(x) = ln (e-2 + ex) then g(x) = ln(ex - e-2)
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