1.

If ex + ey = ex+y, then dy/dx is :(a) ey - x(b) ex + y(c) – ey - x(d) 2 ex - y

Answer»

Option : (c)

ex+ey = ex+y 

⇒ e-y + e-x = 1 

Differentiating w.r.t. x : 

⇒ -e-y\(\frac{dy}{dx}\)-e-x = 0

⇒ \(\frac{dy}{dx}\) = -ey-x



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