If $x=e^{(y+e)^{(y+e)}(y+\ldots \ldots \infty)}$, then $\frac{d y}{d x}=$

If $x=e^{(y+e)^{(y+e)}(y+\ldots \ldots \infty)}$, then $\frac{d y}{d x}=$
  1. $\frac{1-x}{x}$
  2. $\frac{1+x}{x}$
  3. $\frac{1}{x}$
  4. $\frac{x}{1+x}$

Solution

Here $x=e^{y+x}$ Differentiating w.r.t. $\mathrm{x}$ $\begin{array}{l} 1=e^{y+x}\left(\frac{d y}{d x}+1\right) \Rightarrow 1=e^{y+x} \frac{d y}{d x}+e^{y+x} \\ \therefore 1=x \cdot \frac{d y}{d x}+x \\ \frac{d y}{d x}=\frac{1-x}{x} \end{array}$

Asked in: MHT CET 2020 (20 Oct Shift 1)

Practice more Differentiation questions on Aicharya