English

Solve the following differential equation dydx = x2y + y - Mathematics and Statistics

Advertisements
Advertisements

Question

Solve the following differential equation `("d"y)/("d"x)` = x2y + y

Sum

Solution

`("d"y)/("d"x)` = x2y + y 

= (x2 + 1)y

∴ `1/y  "d"y` = (x2 + 1) dx

Integrating on both sides, we get

`int 1/y  "d"y = int(x^2 + 1)  "d"x`

∴ log |y| = `x^3/3 + x + c`

shaalaa.com
  Is there an error in this question or solution?
Chapter 1.8: Differential Equation and Applications - Q.4

APPEARS IN

SCERT Maharashtra Mathematics and Statistics (Commerce) [English] 12 Standard HSC
Chapter 1.8 Differential Equation and Applications
Q.4 | Q 6

RELATED QUESTIONS

Show that y = AeBx is a solution of the differential equation

\[\frac{d^2 y}{d x^2} = \frac{1}{y} \left( \frac{dy}{dx} \right)^2\]

\[\frac{dy}{dx} = \frac{1 - \cos x}{1 + \cos x}\]

Solve the following differential equation:
\[xy\frac{dy}{dx} = 1 + x + y + xy\]

 


\[\frac{dy}{dx} = 1 + x^2 + y^2 + x^2 y^2 , y\left( 0 \right) = 1\]

Solve the differential equation \[x\frac{dy}{dx} + \cot y = 0\] given that \[y = \frac{\pi}{4}\], when \[x=\sqrt{2}\]


\[\frac{dy}{dx} = \tan\left( x + y \right)\]

x2 dy + y (x + y) dx = 0


\[\frac{dy}{dx} = \frac{y}{x} - \sqrt{\frac{y^2}{x^2} - 1}\]

\[\frac{dy}{dx} = \frac{y}{x} + \sin\left( \frac{y}{x} \right)\]

 

A bank pays interest by continuous compounding, that is, by treating the interest rate as the instantaneous rate of change of principal. Suppose in an account interest accrues at 8% per year, compounded continuously. Calculate the percentage increase in such an account over one year.


Find the curve for which the intercept cut-off by a tangent on x-axis is equal to four times the ordinate of the point of contact.

 

Find the equation of the curve which passes through the point (3, −4) and has the slope \[\frac{2y}{x}\]  at any point (x, y) on it.


What is integrating factor of \[\frac{dy}{dx}\] + y sec x = tan x?


Form the differential equation of the family of parabolas having vertex at origin and axis along positive y-axis.


Solve the following differential equation.

`dy/dx = x^2 y + y`


Solve the following differential equation.

y dx + (x - y2 ) dy = 0


Choose the correct alternative.

The differential equation of y = `k_1 + k_2/x` is


The function y = cx is the solution of differential equation `("d"y)/("d"x) = y/x`


Solve the following differential equation 

sec2 x tan y dx + sec2 y tan x dy = 0

Solution: sec2 x tan y dx + sec2 y tan x dy = 0

∴ `(sec^2x)/tanx  "d"x + square` = 0

Integrating, we get

`square + int (sec^2y)/tany  "d"y` = log c

Each of these integral is of the type

`int ("f'"(x))/("f"(x))  "d"x` = log |f(x)| + log c

∴ the general solution is

`square + log |tan y|` = log c

∴ log |tan x . tan y| = log c

`square`

This is the general solution.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×