If e^{\\theta\\phi}=c+4 \\theta\\phi, where c is an arbitrary constant and \\phi is a function of \theta, then what is \\phi{d} \\theta equal to? [NDA-I 2020]

UPSC NDA I and II 2020 Math Solved Paper

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

[NDA-I 2020]

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