Question
If $x ^{ y }= e ^{ x - y }$, then prove that $\frac{d y}{d x}=\frac{\log x}{(1+\log x)^2}$.

Answer

self

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Evaluate: $\int \frac{x^3+x^2+2 x+1}{x^2-x+1} d x$
Evaluate the following integrals:
$\int\sin^3\text{x}\cos^5\text{x}\text{ dx}$
Find the value of $\lambda$ so that the following vectors are coplanar:
$\vec{\text{a}}=2\hat{\text{i}}-\hat{\text{j}}++\hat{\text{k}},\vec{\text{b}}=\hat{\text{i}}+2\hat{\text{j}}-3\hat{\text{k}},\vec{\text{c}}=\lambda\hat{\text{i}}+\lambda\hat{\text{j}}+5\hat{\text{k}}$
Give examples of two functions f : N → Z and g : Z → Z, such that gof is injective but g is not injective.
Evaluate the following integrals:
$\int\frac{\text{x}^3-3\text{x}^2+5\text{x}-7+\text{x}^2\text{a}^\text{x}}{2\text{x}^2}\text{dx}$
Evaluate: $\int\left\{\frac{1}{\log x}-\frac{1}{(\log x)^2}\right\} d x$; (where $\left.x>1\right)$.
If the coordinates of the points A, B, C, D be (1, 2, 3), (4, 5, 7), (-4, 3, -6) and (2, 9, 2) respectively, then find the angle between the lines AB and CD.
A pair of dice is thrown 4 times. If getting a doublet is considered a success, find the probability distribution of the number of successes and, hence, find its mean.
Urn $A$ contains $1$ white $, 2$ black and $3$ red balls; urn $B$ contains $2$ white $,1$ black and $1$ red ball; and urn $C$ contains $4$ white $,5$ black and $3$ red balls. One urn is chosen at random and two balls are drawn. These happen to be one white and one red. What is the probability that they come from urn $A$?
$\text{A}=\begin{bmatrix}\cos\alpha&\sin\alpha\\-\sin\alpha&\cos\alpha\end{bmatrix}$, then verify that A'A = I