# Question Bank Solutions for BE Automobile Engineering Semester 2 (FE First Year) - University of Mumbai - Applied Mathematics 2

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Applied Mathematics 2
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Solve (D^2-3D+2) y= 2 e^x sin(x/2)

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Using D.U.I.S prove that int_0^∞ e^-(x^+a^2/x^2) dx=sqrtpi/2 e^(-2a), a> 0

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Change the order of integration and evaluate int_0^1 int_x^sqrt(2-x^2 x  dx  dy)/sqrt(x^2+y^2)

 Differentiation Under Integral Sign, Numerical Integration and Rectification
Chapter:  Differentiation Under Integral Sign, Numerical Integration and Rectification
Concept: Differentiation Under Integral Sign with Constant Limits of Integration

Show that int_0^asqrt(x^3/(a^3-x^3))dx=a(sqrtxgamma(5/6))/(gamma(1/3))

 Differentiation Under Integral Sign, Numerical Integration and Rectification
Chapter:  Differentiation Under Integral Sign, Numerical Integration and Rectification
Concept: Differentiation Under Integral Sign with Constant Limits of Integration

Solve (D^2+2)y=e^xcosx+x^2e^(3x)

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Evaluate int_0^1int_0^( 1-x)1int_0^( 1-x-y)     1/(x+y+z+1)^3 dx dy dz

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Find the mass of the lemniscate 𝒓𝟐=𝒂𝟐𝒄𝒐𝒔 𝟐𝜽 if the density at any point is Proportional to the square of the distance from the pole .

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Solve  x^2 (d^3y)/dx^3+3x (d^2y)/dx^2+dy/dx+y/x=4log x

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Prove that for an astroid     x^(2/3) +y2/3= a^(2/3) the line 𝜽=𝝅/𝟔 Divide the arc in the first quadrant in a ratio 1:3.

 Differential Equations of First Order and First Degree
Chapter:  Differential Equations of First Order and First Degree
Concept: Exact Differential Equations

Solve (D^2-7D-6)y=(1+x^2)e^(2x)

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Apply Rungee Kutta method of fourth order to find an approximate Value of y when x=0.4 given that dy/dx=(y-x)/(y+x),y=1 𝒚=𝟏 𝒘𝒉𝒆𝒏 𝒙=𝟎 Taking h=0.2.

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Use Taylor series method to find a solution of dy/dx=xy+1,y(0)=0 X=0.2 taking h=0.1 correct upto 4 decimal places.

 Numerical Solution of Ordinary Differential Equations of First Order and First Degree, Beta and Gamma Function
Chapter:  Numerical Solution of Ordinary Differential Equations of First Order and First Degree, Beta and Gamma Function
Concept: Taylor’S Series Method

Solve by variation of parameters ((d^2y)/dx^2+1)y=1/(1+sin x)

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Compute the value of int _0.2^1.4 (sin  x - In x+e^x)  Trapezoidal Rule (ii) Simpson’s (1/3)rd rule (iii) Simpson’s (3/8)th rule by dividing Into six subintervals.

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Evaluate int_0^(a/sqrt2) int_y^(sqrt(a2-y^2)) log (x^2+y^2) "dxdy by changing to polar Coordinates".

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Evaluate int int int  x^2 yzdzdydzover the volume bounded by planes x=0, y=0, z=0 and x/a+y/b+z/c=1

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Evaluate int_0^inftye^(x^3)/sqrtx dx

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Find the length of the curve x=y^3/3+1/(4y) from y=1 to y=2

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Solve (D^2+D)y=e^(4x)

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function

Evaluate int_0^1 int_(x^2)^x xy(x+y)dydx.

 Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Chapter:  Linear Differential Equations with Constant Coefficients and Variable Coefficients of Higher Order
Concept: Linear Differential Equation with Constant Coefficient‐ Complementary Function
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