1.

If eθϕ = c + 4θϕ, where c is an arbitrary constant and ϕ is a function of θ, then what is ϕ dθ equal to?

A. θ dϕ
B. - θdϕ
C. 4θ dϕ
D. -4θ dϕ
Answer» C. 4θ dϕ


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