हिंदी

Given that dydxdydx = yex and x = 0, y = e. Find the value of y when x = 1. - Mathematics

Advertisements
Advertisements

प्रश्न

Given that `"dy"/"dx"` = yex and x = 0, y = e. Find the value of y when x = 1.

योग

उत्तर

`"dy"/"dx"` = yex 

⇒ `int "dy"/y = int "e"^x  "d"x`

⇒ logy = ex + c

Substituting x = 0 and y = e

We get loge = e0+ c

i.e., c = 0  ....(∵ loge = 1)

Therefore, log y = ex.

Now, substituting x = 1 in the above

We get log y = e

⇒ y = ex.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 9: Differential Equations - Solved Examples [पृष्ठ १८१]

APPEARS IN

एनसीईआरटी एक्झांप्लर Mathematics [English] Class 12
अध्याय 9 Differential Equations
Solved Examples | Q 3 | पृष्ठ १८१

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

Find the differential equation of all the parabolas with latus rectum '4a' and whose axes are parallel to x-axis.


Verify that \[y = ce^{tan^{- 1}} x\]  is a solution of the differential equation \[\left( 1 + x^2 \right)\frac{d^2 y}{d x^2} + \left( 2x - 1 \right)\frac{dy}{dx} = 0\]


Differential equation \[\frac{dy}{dx} + y = 2, y \left( 0 \right) = 3\] Function y = e−x + 2


Differential equation \[\frac{d^2 y}{d x^2} + y = 0, y \left( 0 \right) = 1, y' \left( 0 \right) = 1\] Function y = sin x + cos x


\[\frac{dy}{dx} = x^2 + x - \frac{1}{x}, x \neq 0\]

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

\[\frac{dy}{dx} = \tan^{- 1} x\]


\[\frac{dy}{dx} - x \sin^2 x = \frac{1}{x \log x}\]

\[\sqrt{a + x} dy + x\ dx = 0\]

\[\frac{dy}{dx} = x \log x\]

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

Solve the following differential equation:
\[y\left( 1 - x^2 \right)\frac{dy}{dx} = x\left( 1 + y^2 \right)\]

 


Find the particular solution of edy/dx = x + 1, given that y = 3, when x = 0.


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

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

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

\[\left[ x\sqrt{x^2 + y^2} - y^2 \right] dx + xy\ dy = 0\]

Solve the following initial value problem:-
\[x\frac{dy}{dx} - y = \log x, y\left( 1 \right) = 0\]


The rate of increase in the number of bacteria in a certain bacteria culture is proportional to the number present. Given the number triples in 5 hrs, find how many bacteria will be present after 10 hours. Also find the time necessary for the number of bacteria to be 10 times the number of initial present.


Integrating factor of the differential equation cos \[x\frac{dy}{dx} + y\] sin x = 1, is


The solution of the differential equation y1 y3 = y22 is


Which of the following is the integrating factor of (x log x) \[\frac{dy}{dx} + y\] = 2 log x?


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`

For each of the following differential equations find the particular solution.

(x − y2 x) dx − (y + x2 y) dy = 0, when x = 2, y = 0


Solve the following differential equation.

xdx + 2y dx = 0


Select and write the correct alternative from the given option for the question 

Differential equation of the function c + 4yx = 0 is


Find the particular solution of the following differential equation

`("d"y)/("d"x)` = e2y cos x, when x = `pi/6`, y = 0.

Solution: The given D.E. is `("d"y)/("d"x)` = e2y cos x

∴ `1/"e"^(2y)  "d"y` = cos x dx

Integrating, we get

`int square  "d"y` = cos x dx

∴ `("e"^(-2y))/(-2)` = sin x + c1

∴ e–2y = – 2sin x – 2c1

∴ `square` = c, where c = – 2c

This is general solution.

When x = `pi/6`, y = 0, we have

`"e"^0 + 2sin  pi/6` = c

∴ c = `square`

∴ particular solution is `square`


Solve `x^2 "dy"/"dx" - xy = 1 + cos(y/x)`, x ≠ 0 and x = 1, y = `pi/2`


Solve: ydx – xdy = x2ydx.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×