मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Solve the following differential equation dydx = x2y + y

Advertisements
Advertisements

प्रश्न

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

बेरीज
Advertisements

उत्तर

`("d"y)/("d"x)` = x2y + y

∴ `("d"y)/("d"x)` = y(x2 + 1)

∴ `("d"y)/y` = (x2 + 1) dx

Integrating on both sides, we get

`int ("d"y)/y = int(x^2 + 1)  "d"x`

∴ log |y| = `x^3/3 + x + "c"`

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2.6: Differential Equations - Attempt the following questions II

व्हिडिओ ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्‍न

If 1, `omega` and `omega^2` are the cube roots of unity, prove `(a + b omega + c omega^2)/(c + s omega +  b omega^2) =  omega^2`


\[\frac{d^2 y}{d x^2} + 4y = 0\]

\[y\frac{d^2 x}{d y^2} = y^2 + 1\]

Show that Ax2 + By2 = 1 is a solution of the differential equation x \[\left\{ y\frac{d^2 y}{d x^2} + \left( \frac{dy}{dx} \right)^2 \right\} = y\frac{dy}{dx}\]

 


Show that y = ex (A cos x + B sin x) is the solution of the differential equation \[\frac{d^2 y}{d x^2} - 2\frac{dy}{dx} + 2y = 0\]


Verify that y = cx + 2c2 is a solution of the differential equation 

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

Verify that y = log \[\left( x + \sqrt{x^2 + a^2} \right)^2\]  satisfies the differential equation \[\left( a^2 + x^2 \right)\frac{d^2 y}{d x^2} + x\frac{dy}{dx} = 0\]


Differential equation \[\frac{d^2 y}{d x^2} - 2\frac{dy}{dx} + y = 0, y \left( 0 \right) = 1, y' \left( 0 \right) = 2\] Function y = xex + ex


\[\left( 1 + x^2 \right)\frac{dy}{dx} - x = 2 \tan^{- 1} x\]

C' (x) = 2 + 0.15 x ; C(0) = 100


\[x\frac{dy}{dx} + 1 = 0 ; y \left( - 1 \right) = 0\]

\[x\frac{dy}{dx} + y = y^2\]

\[\frac{dy}{dx} = \frac{x\left( 2 \log x + 1 \right)}{\sin y + y \cos y}\]

(1 − x2) dy + xy dx = xy2 dx


tan y dx + sec2 y tan x dy = 0


(1 + x) (1 + y2) dx + (1 + y) (1 + x2) dy = 0


\[\frac{dy}{dx} + \frac{\cos x \sin y}{\cos y} = 0\]

(y + xy) dx + (x − xy2) dy = 0


(y2 + 1) dx − (x2 + 1) dy = 0


\[2x\frac{dy}{dx} = 5y, y\left( 1 \right) = 1\]

In a bank principal increases at the rate of r% per year. Find the value of r if ₹100 double itself in 10 years (loge 2 = 0.6931).


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

(x + 2y) dx − (2x − y) dy = 0


Solve the following initial value problem:-

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


Solve the following initial value problem:-

\[\frac{dy}{dx} + 2y \tan x = \sin x; y = 0\text{ when }x = \frac{\pi}{3}\]


If the marginal cost of manufacturing a certain item is given by C' (x) = \[\frac{dC}{dx}\] = 2 + 0.15 x. Find the total cost function C (x), given that C (0) = 100.

 

Find the equation of the curve which passes through the point (2, 2) and satisfies the differential equation
\[y - x\frac{dy}{dx} = y^2 + \frac{dy}{dx}\]


Find the equation of the curve passing through the point \[\left( 1, \frac{\pi}{4} \right)\]  and tangent at any point of which makes an angle tan−1  \[\left( \frac{y}{x} - \cos^2 \frac{y}{x} \right)\] with x-axis.


Find the equation of the curve which passes through the origin and has the slope x + 3y− 1 at any point (x, y) on it.


Radium decomposes at a rate proportional to the quantity of radium present. It is found that in 25 years, approximately 1.1% of a certain quantity of radium has decomposed. Determine approximately how long it will take for one-half of the original amount of  radium to decompose?


Find the equation of the curve that passes through the point (0, a) and is such that at any point (x, y) on it, the product of its slope and the ordinate is equal to the abscissa.


Write the differential equation obtained eliminating the arbitrary constant C in the equation xy = C2.


If sin x is an integrating factor of the differential equation \[\frac{dy}{dx} + Py = Q\], then write the value of P.


The differential equation obtained on eliminating A and B from y = A cos ωt + B sin ωt, is


The equation of the curve whose slope is given by \[\frac{dy}{dx} = \frac{2y}{x}; x > 0, y > 0\] and which passes through the point (1, 1) is


The differential equation \[x\frac{dy}{dx} - y = x^2\], has the general solution


The differential equation `y dy/dx + x = 0` represents family of ______.


In each of the following examples, verify that the given function is a solution of the corresponding differential equation.

Solution D.E.
y = ex  `dy/ dx= y`

Determine the order and degree of the following differential equations.

Solution D.E.
ax2 + by2 = 5 `xy(d^2y)/dx^2+ x(dy/dx)^2 = y dy/dx`

Solve the following differential equation.

`xy  dy/dx = x^2 + 2y^2`


Solve the following differential equation.

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


Solve the following differential equation.

`dy/dx + y = e ^-x`


y2 dx + (xy + x2)dy = 0


Solve the following differential equation y2dx + (xy + x2) dy = 0


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


Given that `"dy"/"dx" = "e"^-2x` and y = 0 when x = 5. Find the value of x when y = 3.


Solve the differential equation `"dy"/"dx" + 2xy` = y


There are n students in a school. If r % among the students are 12 years or younger, which of the following expressions represents the number of students who are older than 12?


The differential equation (1 + y2)x dx – (1 + x2)y dy = 0 represents a family of:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×